165705772157652 has 12 divisors (see below), whose sum is σ = 386646801701216. Its totient is φ = 55235257385880.

The previous prime is 165705772157599. The next prime is 165705772157753. The reversal of 165705772157652 is 256751277507561.

165705772157652 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 6904407173224 + ... + 6904407173247.

Almost surely, 2^{165705772157652} is an apocalyptic number.

165705772157652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165705772157652 is an abundant number, since it is smaller than the sum of its proper divisors (220941029543564).

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

165705772157652 is a wasteful number, since it uses less digits than its factorization.

165705772157652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13808814346478 (or 13808814346476 counting only the distinct ones).

The product of its (nonzero) digits is 216090000, while the sum is 66.

The spelling of 165705772157652 in words is "one hundred sixty-five trillion, seven hundred five billion, seven hundred seventy-two million, one hundred fifty-seven thousand, six hundred fifty-two".