165364868020 has 24 divisors (see below), whose sum is σ = 378835879968. Its totient is φ = 60132679200.

The previous prime is 165364868003. The next prime is 165364868057. The reversal of 165364868020 is 20868463561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375829026 + ... + 375829465.

It is an arithmetic number, because the mean of its divisors is an integer number (15784828332).

Almost surely, 2^165364868020 is an apocalyptic number.

165364868020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165364868020 is an abundant number, since it is smaller than the sum of its proper divisors (213471011948).

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

165364868020 is a wasteful number, since it uses less digits than its factorization.

165364868020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751658511 (or 751658509 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 165364868020 in words is "one hundred sixty-five billion, three hundred sixty-four million, eight hundred sixty-eight thousand, twenty".