165501615516 has 24 divisors (see below), whose sum is σ = 408886344720. Its totient is φ = 51922075392.

The previous prime is 165501615509. The next prime is 165501615563. The reversal of 165501615516 is 615516105561.

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, 405641011 + ... + 405641418.

It is an arithmetic number, because the mean of its divisors is an integer number (17036931030).

Almost surely, 2^165501615516 is an apocalyptic number.

It is an amenable number.

165501615516 is an abundant number, since it is smaller than the sum of its proper divisors (243384729204).

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

165501615516 is a wasteful number, since it uses less digits than its factorization.

165501615516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811282453 (or 811282451 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 165501615516 in words is "one hundred sixty-five billion, five hundred one million, six hundred fifteen thousand, five hundred sixteen".