165807825372 has 72 divisors (see below), whose sum is σ = 479108238336. Its totient is φ = 47362997664.

The previous prime is 165807825343. The next prime is 165807825389. The reversal of 165807825372 is 273528708561.

165807825372 is a `hidden beast` number, since 1 + 6 + 580 + 7 + 8 + 2 + 53 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1083133 + ... + 1226699.

It is an arithmetic number, because the mean of its divisors is an integer number (6654281088).

Almost surely, 2^165807825372 is an apocalyptic number.

165807825372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165807825372 is an abundant number, since it is smaller than the sum of its proper divisors (313300412964).

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

165807825372 is a wasteful number, since it uses less digits than its factorization.

165807825372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148167 (or 148162 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 165807825372 in words is "one hundred sixty-five billion, eight hundred seven million, eight hundred twenty-five thousand, three hundred seventy-two".