72388520874 has 12 divisors (see below), whose sum is σ = 156841795266. Its totient is φ = 24129506952.

The previous prime is 72388520837. The next prime is 72388520881. The reversal of 72388520874 is 47802588327.

72388520874 is a `hidden beast` number, since 7 + 2 + 38 + 8 + 520 + 87 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68977143225 + 3411377649 = 262635^2 + 58407^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72388520874.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2010792229 + ... + 2010792264.

Almost surely, 2^72388520874 is an apocalyptic number.

72388520874 is an abundant number, since it is smaller than the sum of its proper divisors (84453274392).

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

72388520874 is a wasteful number, since it uses less digits than its factorization.

72388520874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021584501 (or 4021584498 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 72388520874 in words is "seventy-two billion, three hundred eighty-eight million, five hundred twenty thousand, eight hundred seventy-four".