72386912517 has 32 divisors (see below), whose sum is σ = 100867710720. Its totient is φ = 46129720320.

The previous prime is 72386912513. The next prime is 72386912527. The reversal of 72386912517 is 71521968327.

It is not a de Polignac number, because 72386912517 - 2² = 72386912513 is a prime.

It is a super-2 number, since 2×72386912517² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72386912517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72386912513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6216733 + ... + 6228365.

It is an arithmetic number, because the mean of its divisors is an integer number (3152115960).

Almost surely, 2^72386912517 is an apocalyptic number.

It is an amenable number.

72386912517 is a deficient number, since it is larger than the sum of its proper divisors (28480798203).

72386912517 is a wasteful number, since it uses less digits than its factorization.

72386912517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12653.

The product of its digits is 1270080, while the sum is 51.

The spelling of 72386912517 in words is "seventy-two billion, three hundred eighty-six million, nine hundred twelve thousand, five hundred seventeen".