165161061636 has 48 divisors (see below), whose sum is σ = 389259114048. Its totient is φ = 54499120000.

The previous prime is 165161061623. The next prime is 165161061643. The reversal of 165161061636 is 636160161561.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11874286 + ... + 11888186.

It is an arithmetic number, because the mean of its divisors is an integer number (8109564876).

Almost surely, 2^165161061636 is an apocalyptic number.

It is an amenable number.

165161061636 is an abundant number, since it is smaller than the sum of its proper divisors (224098052412).

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

165161061636 is a wasteful number, since it uses less digits than its factorization.

165161061636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23812 (or 23810 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 165161061636 in words is "one hundred sixty-five billion, one hundred sixty-one million, sixty-one thousand, six hundred thirty-six".