161110515504 has 40 divisors (see below), whose sum is σ = 438107544640. Its totient is φ = 50877004608.

The previous prime is 161110515481. The next prime is 161110515541. The reversal of 161110515504 is 405515011161.

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, 88327222 + ... + 88329045.

It is an arithmetic number, because the mean of its divisors is an integer number (10952688616).

Almost surely, 2^161110515504 is an apocalyptic number.

It is an amenable number.

161110515504 is an abundant number, since it is smaller than the sum of its proper divisors (276997029136).

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

161110515504 is a wasteful number, since it uses less digits than its factorization.

161110515504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176656297 (or 176656291 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 161110515504 its reverse (405515011161), we get a palindrome (566625526665).

The spelling of 161110515504 in words is "one hundred sixty-one billion, one hundred ten million, five hundred fifteen thousand, five hundred four".