72220720520508 has 24 divisors (see below), whose sum is σ = 192588588054912. Its totient is φ = 20634491577264.

The previous prime is 72220720520369. The next prime is 72220720520519. The reversal of 72220720520508 is 80502502702227.

It is a super-3 number, since 3×72220720520508³ (a number of 43 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 72220720520508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429885241110 + ... + 429885241277.

It is an arithmetic number, because the mean of its divisors is an integer number (8024524502288).

Almost surely, 2^{72220720520508} is an apocalyptic number.

It is an amenable number.

72220720520508 is an abundant number, since it is smaller than the sum of its proper divisors (120367867534404).

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

72220720520508 is a wasteful number, since it uses less digits than its factorization.

72220720520508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859770482401 (or 859770482399 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 42.

The spelling of 72220720520508 in words is "seventy-two trillion, two hundred twenty billion, seven hundred twenty million, five hundred twenty thousand, five hundred eight".