161505113916 has 24 divisors (see below), whose sum is σ = 380367187200. Its totient is φ = 53331906352.

The previous prime is 161505113909. The next prime is 161505113993. The reversal of 161505113916 is 619311505161.

161505113916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 62890116 + ... + 62892683.

It is an arithmetic number, because the mean of its divisors is an integer number (15848632800).

Almost surely, 2^161505113916 is an apocalyptic number.

It is an amenable number.

161505113916 is an abundant number, since it is smaller than the sum of its proper divisors (218862073284).

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

161505113916 is a wasteful number, since it uses less digits than its factorization.

161505113916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125782913 (or 125782911 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 39.

The spelling of 161505113916 in words is "one hundred sixty-one billion, five hundred five million, one hundred thirteen thousand, nine hundred sixteen".