72116520715 has 8 divisors (see below), whose sum is σ = 86543272080. Its totient is φ = 57690918432.

The previous prime is 72116520701. The next prime is 72116520719. The reversal of 72116520715 is 51702561127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72116520715 is a prime.

It is a super-2 number, since 2×72116520715² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72116520719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142569 + ... + 405658.

It is an arithmetic number, because the mean of its divisors is an integer number (10817909010).

Almost surely, 2^72116520715 is an apocalyptic number.

72116520715 is a deficient number, since it is larger than the sum of its proper divisors (14426751365).

72116520715 is a wasteful number, since it uses less digits than its factorization.

72116520715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574541.

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 72116520715 in words is "seventy-two billion, one hundred sixteen million, five hundred twenty thousand, seven hundred fifteen".