161633701 has 8 divisors (see below), whose sum is σ = 165758400. Its totient is φ = 157560480.

The previous prime is 161633699. The next prime is 161633711. The reversal of 161633701 is 107336161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161633701 - 2¹ = 161633699 is a prime.

It is a super-2 number, since 2×161633701² = 52250906597914802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161633701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161633711) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6471 + ... + 19108.

It is an arithmetic number, because the mean of its divisors is an integer number (20719800).

Almost surely, 2^161633701 is an apocalyptic number.

It is an amenable number.

161633701 is a deficient number, since it is larger than the sum of its proper divisors (4124699).

161633701 is an equidigital number, since it uses as much as digits as its factorization.

161633701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25739.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 161633701 is about 12713.5243343457. The cubic root of 161633701 is about 544.7249977520.

Adding to 161633701 its reverse (107336161), we get a palindrome (268969862).

The spelling of 161633701 in words is "one hundred sixty-one million, six hundred thirty-three thousand, seven hundred one".