161632580826 has 16 divisors (see below), whose sum is σ = 326230898400. Its totient is φ = 53383237488.

The previous prime is 161632580777. The next prime is 161632580843. The reversal of 161632580826 is 628085236161.

It is a happy number.

It is a super-2 number, since 2×161632580826² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123571656 + ... + 123572963.

It is an arithmetic number, because the mean of its divisors is an integer number (20389431150).

Almost surely, 2^161632580826 is an apocalyptic number.

161632580826 is an abundant number, since it is smaller than the sum of its proper divisors (164598317574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161632580826 is a wasteful number, since it uses less digits than its factorization.

161632580826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247144733.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 161632580826 in words is "one hundred sixty-one billion, six hundred thirty-two million, five hundred eighty thousand, eight hundred twenty-six".