372665221812 has 72 divisors (see below), whose sum is σ = 1074152721096. Its totient is φ = 107921147904.

The previous prime is 372665221757. The next prime is 372665221823. The reversal of 372665221812 is 218122566273.

372665221812 is a `hidden beast` number, since 372 + 6 + 6 + 52 + 218 + 12 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 167488836516 + 205176385296 = 409254^2 + 452964^2 .

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, 23412433 + ... + 23428344.

It is an arithmetic number, because the mean of its divisors is an integer number (14918787793).

Almost surely, 2^372665221812 is an apocalyptic number.

It is an amenable number.

372665221812 is an abundant number, since it is smaller than the sum of its proper divisors (701487499284).

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

372665221812 is a wasteful number, since it uses less digits than its factorization.

372665221812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46840817 (or 46840812 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 372665221812 in words is "three hundred seventy-two billion, six hundred sixty-five million, two hundred twenty-one thousand, eight hundred twelve".