72513518938 has 16 divisors (see below), whose sum is σ = 131621177664. Its totient is φ = 29249150400.

The previous prime is 72513518923. The next prime is 72513518953. The reversal of 72513518938 is 83981531527.

It is an interprime number because it is at equal distance from previous prime (72513518923) and next prime (72513518953).

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, 152339088 + ... + 152339563.

It is an arithmetic number, because the mean of its divisors is an integer number (8226323604).

Almost surely, 2^72513518938 is an apocalyptic number.

72513518938 is a deficient number, since it is larger than the sum of its proper divisors (59107658726).

72513518938 is a wasteful number, since it uses less digits than its factorization.

72513518938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304678677.

The product of its digits is 1814400, while the sum is 52.

The spelling of 72513518938 in words is "seventy-two billion, five hundred thirteen million, five hundred eighteen thousand, nine hundred thirty-eight".