161632246225523 has 4 divisors (see below), whose sum is σ = 161632528404960. Its totient is φ = 161631964046088.

The previous prime is 161632246225453. The next prime is 161632246225577. The reversal of 161632246225523 is 325522642236161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161632246225523 is a prime.

It is a super-2 number, since 2×161632246225523² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161632246227523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140228768 + ... + 141376701.

It is an arithmetic number, because the mean of its divisors is an integer number (40408132101240).

Almost surely, 2^{161632246225523} is an apocalyptic number.

161632246225523 is a deficient number, since it is larger than the sum of its proper divisors (282179437).

161632246225523 is an equidigital number, since it uses as much as digits as its factorization.

161632246225523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282179436.

The product of its digits is 6220800, while the sum is 50.

The spelling of 161632246225523 in words is "one hundred sixty-one trillion, six hundred thirty-two billion, two hundred forty-six million, two hundred twenty-five thousand, five hundred twenty-three".