72887805131 has 4 divisors (see below), whose sum is σ = 73120673832. Its totient is φ = 72654936432.

The previous prime is 72887805127. The next prime is 72887805173. The reversal of 72887805131 is 13150878827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13150878827 = 14923 ⋅881249.

It is a cyclic number.

It is not a de Polignac number, because 72887805131 - 2² = 72887805127 is a prime.

It is a super-2 number, since 2×72887805131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72887805131.

It is not an unprimeable number, because it can be changed into a prime (72887805101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116433881 + ... + 116434506.

It is an arithmetic number, because the mean of its divisors is an integer number (18280168458).

Almost surely, 2^72887805131 is an apocalyptic number.

72887805131 is a deficient number, since it is larger than the sum of its proper divisors (232868701).

72887805131 is a wasteful number, since it uses less digits than its factorization.

72887805131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232868700.

The product of its (nonzero) digits is 752640, while the sum is 50.

The spelling of 72887805131 in words is "seventy-two billion, eight hundred eighty-seven million, eight hundred five thousand, one hundred thirty-one".