72217271502 has 48 divisors (see below), whose sum is σ = 156965870880. Its totient is φ = 23996347200.

The previous prime is 72217271479. The next prime is 72217271519. The reversal of 72217271502 is 20517271227.

It is a happy number.

72217271502 is a `hidden beast` number, since 72 + 2 + 17 + 2 + 71 + 502 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12280999 + ... + 12286877.

It is an arithmetic number, because the mean of its divisors is an integer number (3270122310).

Almost surely, 2^72217271502 is an apocalyptic number.

72217271502 is an abundant number, since it is smaller than the sum of its proper divisors (84748599378).

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

72217271502 is a wasteful number, since it uses less digits than its factorization.

72217271502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929 (or 7926 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The spelling of 72217271502 in words is "seventy-two billion, two hundred seventeen million, two hundred seventy-one thousand, five hundred two".