165807555013 has 32 divisors (see below), whose sum is σ = 190077788160. Its totient is φ = 143691018240.

The previous prime is 165807555007. The next prime is 165807555031. The reversal of 165807555013 is 310555708561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165807555013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165807555073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3799548 + ... + 3842938.

It is an arithmetic number, because the mean of its divisors is an integer number (5939930880).

Almost surely, 2^165807555013 is an apocalyptic number.

It is an amenable number.

165807555013 is a deficient number, since it is larger than the sum of its proper divisors (24270233147).

165807555013 is a wasteful number, since it uses less digits than its factorization.

165807555013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43797.

The product of its (nonzero) digits is 630000, while the sum is 46.

The spelling of 165807555013 in words is "one hundred sixty-five billion, eight hundred seven million, five hundred fifty-five thousand, thirteen".