72015252557499 has 12 divisors (see below), whose sum is σ = 106235266184736. Its totient is φ = 46988675427312.

The previous prime is 72015252557483. The next prime is 72015252557531. The reversal of 72015252557499 is 99475525251027.

72015252557499 is a `hidden beast` number, since 7 + 2 + 0 + 1 + 5 + 2 + 52 + 5 + 574 + 9 + 9 = 666.

It is not a de Polignac number, because 72015252557499 - 2⁴ = 72015252557483 is a prime.

It is a super-2 number, since 2×72015252557499² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72015252557299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85124411584 + ... + 85124412429.

It is an arithmetic number, because the mean of its divisors is an integer number (8852938848728).

Almost surely, 2^{72015252557499} is an apocalyptic number.

72015252557499 is a deficient number, since it is larger than the sum of its proper divisors (34220013627237).

72015252557499 is a wasteful number, since it uses less digits than its factorization.

72015252557499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170248824066 (or 170248824063 counting only the distinct ones).

The product of its (nonzero) digits is 79380000, while the sum is 63.

The spelling of 72015252557499 in words is "seventy-two trillion, fifteen billion, two hundred fifty-two million, five hundred fifty-seven thousand, four hundred ninety-nine".