165057171772 has 12 divisors (see below), whose sum is σ = 288900828216. Its totient is φ = 82514078000.

The previous prime is 165057171761. The next prime is 165057171857. The reversal of 165057171772 is 277171750561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3601354 + ... + 3646897.

It is an arithmetic number, because the mean of its divisors is an integer number (24075069018).

Almost surely, 2^165057171772 is an apocalyptic number.

It is an amenable number.

165057171772 is a deficient number, since it is larger than the sum of its proper divisors (123843656444).

165057171772 is a wasteful number, since it uses less digits than its factorization.

165057171772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253948 (or 7253946 counting only the distinct ones).

The product of its (nonzero) digits is 720300, while the sum is 49.

The spelling of 165057171772 in words is "one hundred sixty-five billion, fifty-seven million, one hundred seventy-one thousand, seven hundred seventy-two".