72157865015 has 16 divisors (see below), whose sum is σ = 94640451840. Its totient is φ = 52578024960.

The previous prime is 72157864997. The next prime is 72157865023. The reversal of 72157865015 is 51056875127.

It is not a de Polignac number, because 72157865015 - 2⁶ = 72157864951 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, 13689560 + ... + 13694829.

It is an arithmetic number, because the mean of its divisors is an integer number (5915028240).

Almost surely, 2^72157865015 is an apocalyptic number.

72157865015 is a deficient number, since it is larger than the sum of its proper divisors (22482586825).

72157865015 is a wasteful number, since it uses less digits than its factorization.

72157865015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27384442.

The product of its (nonzero) digits is 588000, while the sum is 47.

The spelling of 72157865015 in words is "seventy-two billion, one hundred fifty-seven million, eight hundred sixty-five thousand, fifteen".