165231004644 has 72 divisors (see below), whose sum is σ = 421121500800. Its totient is φ = 54623289600.

The previous prime is 165231004619. The next prime is 165231004663. The reversal of 165231004644 is 446400132561.

165231004644 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 3 + 1 + 0 + 0 + 4 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 165231004599 and 165231004608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2190924 + ... + 2265084.

Almost surely, 2^165231004644 is an apocalyptic number.

It is an amenable number.

165231004644 is an abundant number, since it is smaller than the sum of its proper divisors (255890496156).

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

165231004644 is a wasteful number, since it uses less digits than its factorization.

165231004644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74681 (or 74676 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 165231004644 in words is "one hundred sixty-five billion, two hundred thirty-one million, four thousand, six hundred forty-four".