72807172587 has 6 divisors (see below), whose sum is σ = 105165915972. Its totient is φ = 48538115052.

The previous prime is 72807172583. The next prime is 72807172597. The reversal of 72807172587 is 78527170827.

It is not a de Polignac number, because 72807172587 - 2² = 72807172583 is a prime.

It is a super-2 number, since 2×72807172587² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72807172583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4044842913 + ... + 4044842930.

It is an arithmetic number, because the mean of its divisors is an integer number (17527652662).

Almost surely, 2^72807172587 is an apocalyptic number.

72807172587 is a deficient number, since it is larger than the sum of its proper divisors (32358743385).

72807172587 is a wasteful number, since it uses less digits than its factorization.

72807172587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8089685849 (or 8089685846 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 54.

The spelling of 72807172587 in words is "seventy-two billion, eight hundred seven million, one hundred seventy-two thousand, five hundred eighty-seven".