165722304864 has 96 divisors (see below), whose sum is σ = 436659552000. Its totient is φ = 55033127424.

The previous prime is 165722304763. The next prime is 165722304901. The reversal of 165722304864 is 468403227561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 30244077 + ... + 30249555.

It is an arithmetic number, because the mean of its divisors is an integer number (4548537000).

Almost surely, 2^165722304864 is an apocalyptic number.

It is an amenable number.

165722304864 is an abundant number, since it is smaller than the sum of its proper divisors (270937247136).

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

165722304864 is a wasteful number, since it uses less digits than its factorization.

165722304864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620 (or 6612 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 165722304864 in words is "one hundred sixty-five billion, seven hundred twenty-two million, three hundred four thousand, eight hundred sixty-four".