72520055812 has 24 divisors (see below), whose sum is σ = 134978006016. Its totient is φ = 33974041728.

The previous prime is 72520055719. The next prime is 72520055843. The reversal of 72520055812 is 21855002527.

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, 2376028 + ... + 2406355.

It is an arithmetic number, because the mean of its divisors is an integer number (5624083584).

Almost surely, 2^72520055812 is an apocalyptic number.

It is an amenable number.

72520055812 is a deficient number, since it is larger than the sum of its proper divisors (62457950204).

72520055812 is a wasteful number, since it uses less digits than its factorization.

72520055812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782627 (or 4782625 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 37.

The spelling of 72520055812 in words is "seventy-two billion, five hundred twenty million, fifty-five thousand, eight hundred twelve".