72637005228 has 24 divisors (see below), whose sum is σ = 170986227888. Its totient is φ = 23998066176.

The previous prime is 72637005191. The next prime is 72637005247. The reversal of 72637005228 is 82250073627.

It is a super-2 number, since 2×72637005228² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72637005228.

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 7 ways as a sum of consecutive naturals, for example, 26782201 + ... + 26784912.

It is an arithmetic number, because the mean of its divisors is an integer number (7124426162).

Almost surely, 2^72637005228 is an apocalyptic number.

It is an amenable number.

72637005228 is an abundant number, since it is smaller than the sum of its proper divisors (98349222660).

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

72637005228 is a wasteful number, since it uses less digits than its factorization.

72637005228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53567233 (or 53567231 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 72637005228 in words is "seventy-two billion, six hundred thirty-seven million, five thousand, two hundred twenty-eight".