72112120520 has 32 divisors (see below), whose sum is σ = 177002478720. Its totient is φ = 26222589120.

The previous prime is 72112120513. The next prime is 72112120559. The reversal of 72112120520 is 2502121127.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81945152 + ... + 81946031.

It is an arithmetic number, because the mean of its divisors is an integer number (5531327460).

Almost surely, 2^72112120520 is an apocalyptic number.

It is an amenable number.

72112120520 is an abundant number, since it is smaller than the sum of its proper divisors (104890358200).

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

72112120520 is a wasteful number, since it uses less digits than its factorization.

72112120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163891205 (or 163891201 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 72112120520 its reverse (2502121127), we get a palindrome (74614241647).

The spelling of 72112120520 in words is "seventy-two billion, one hundred twelve million, one hundred twenty thousand, five hundred twenty".