165081906913 has 16 divisors (see below), whose sum is σ = 207938231424. Its totient is φ = 127309109760.

The previous prime is 165081906901. The next prime is 165081906967. The reversal of 165081906913 is 319609180561.

It is not a de Polignac number, because 165081906913 - 2⁵ = 165081906881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165081906973) 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, 11043670 + ... + 11058607.

It is an arithmetic number, because the mean of its divisors is an integer number (12996139464).

Almost surely, 2^165081906913 is an apocalyptic number.

It is an amenable number.

165081906913 is a deficient number, since it is larger than the sum of its proper divisors (42856324511).

165081906913 is a wasteful number, since it uses less digits than its factorization.

165081906913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22102392.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 165081906913 in words is "one hundred sixty-five billion, eighty-one million, nine hundred six thousand, nine hundred thirteen".