72217444536 has 64 divisors (see below), whose sum is σ = 200627143200. Its totient is φ = 24069705984.

The previous prime is 72217444517. The next prime is 72217444547. The reversal of 72217444536 is 63544471227.

72217444536 is a `hidden beast` number, since 7 + 2 + 2 + 1 + 74 + 44 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 72217444491 and 72217444500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2833546 + ... + 2858918.

Almost surely, 2^72217444536 is an apocalyptic number.

It is an amenable number.

72217444536 is an abundant number, since it is smaller than the sum of its proper divisors (128409698664).

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

72217444536 is a wasteful number, since it uses less digits than its factorization.

72217444536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38565 (or 38555 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The spelling of 72217444536 in words is "seventy-two billion, two hundred seventeen million, four hundred forty-four thousand, five hundred thirty-six".