161957365892 has 48 divisors (see below), whose sum is σ = 357880239360. Its totient is φ = 62487017472.

The previous prime is 161957365877. The next prime is 161957365897. The reversal of 161957365892 is 298563759161.

161957365892 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161957365897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7385717 + ... + 7407612.

It is an arithmetic number, because the mean of its divisors is an integer number (7455838320).

Almost surely, 2^161957365892 is an apocalyptic number.

It is an amenable number.

161957365892 is an abundant number, since it is smaller than the sum of its proper divisors (195922873468).

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

161957365892 is a wasteful number, since it uses less digits than its factorization.

161957365892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14793380 (or 14793378 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 62.

The spelling of 161957365892 in words is "one hundred sixty-one billion, nine hundred fifty-seven million, three hundred sixty-five thousand, eight hundred ninety-two".