72761537615 has 16 divisors (see below), whose sum is σ = 94275836928. Its totient is φ = 53591287296.

The previous prime is 72761537603. The next prime is 72761537621. The reversal of 72761537615 is 51673516727.

It is a cyclic number.

It is not a de Polignac number, because 72761537615 - 2²⁴ = 72744760399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1436474 + ... + 1486263.

It is an arithmetic number, because the mean of its divisors is an integer number (5892239808).

Almost surely, 2^72761537615 is an apocalyptic number.

72761537615 is a deficient number, since it is larger than the sum of its proper divisors (21514299313).

72761537615 is a wasteful number, since it uses less digits than its factorization.

72761537615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923138.

The product of its digits is 1852200, while the sum is 50.

The spelling of 72761537615 in words is "seventy-two billion, seven hundred sixty-one million, five hundred thirty-seven thousand, six hundred fifteen".