| Base | Representation |
|---|---|
| bin | 10011010001001… |
| … | …01001001110101 |
| 3 | 102021010210122011 |
| 4 | 21220211021311 |
| 5 | 312334223020 |
| 6 | 24012204221 |
| 7 | 4001566621 |
| oct | 1150451165 |
| 9 | 367123564 |
| 10 | 161632885 |
| 11 | 832681a7 |
| 12 | 46169671 |
| 13 | 27642a7b |
| 14 | 17676181 |
| 15 | e2cb35a |
| hex | 9a25275 |
161632885 has 4 divisors (see below), whose sum is σ = 193959468. Its totient is φ = 129306304.
The previous prime is 161632873. The next prime is 161632897. The reversal of 161632885 is 588236161.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588236161 = 47 ⋅12515663.
It is an interprime number because it is at equal distance from previous prime (161632873) and next prime (161632897).
It can be written as a sum of positive squares in 2 ways, for example, as 98763844 + 62869041 = 9938^2 + 7929^2 .
It is a cyclic number.
It is not a de Polignac number, because 161632885 - 213 = 161624693 is a prime.
It is a super-2 number, since 2×1616328852 = 52250379026846450, which contains 22 as substring.
It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16163284 + ... + 16163293.
It is an arithmetic number, because the mean of its divisors is an integer number (48489867).
Almost surely, 2161632885 is an apocalyptic number.
It is an amenable number.
161632885 is a deficient number, since it is larger than the sum of its proper divisors (32326583).
161632885 is an equidigital number, since it uses as much as digits as its factorization.
161632885 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 32326582.
The product of its digits is 69120, while the sum is 40.
The square root of 161632885 is about 12713.4922424958. The cubic root of 161632885 is about 544.7240810778.
The spelling of 161632885 in words is "one hundred sixty-one million, six hundred thirty-two thousand, eight hundred eighty-five".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •