165408674520 has 32 divisors (see below), whose sum is σ = 496226023920. Its totient is φ = 44108979840.

The previous prime is 165408674503. The next prime is 165408674521. The reversal of 165408674520 is 25476804561.

It is a self number, because there is not a number n which added to its sum of digits gives 165408674520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165408674521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689202691 + ... + 689202930.

Almost surely, 2^165408674520 is an apocalyptic number.

165408674520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165408674520 is an abundant number, since it is smaller than the sum of its proper divisors (330817349400).

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

165408674520 is a wasteful number, since it uses less digits than its factorization.

165408674520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378405635 (or 1378405631 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 165408674520 in words is "one hundred sixty-five billion, four hundred eight million, six hundred seventy-four thousand, five hundred twenty".