72107646687 has 16 divisors (see below), whose sum is σ = 107806204000. Its totient is φ = 47630737152.

The previous prime is 72107646683. The next prime is 72107646707. The reversal of 72107646687 is 78664670127.

72107646687 is a `hidden beast` number, since 72 + 107 + 6 + 466 + 8 + 7 = 666.

It is not a de Polignac number, because 72107646687 - 2² = 72107646683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72107646683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12247762 + ... + 12253647.

It is an arithmetic number, because the mean of its divisors is an integer number (6737887750).

Almost surely, 2^72107646687 is an apocalyptic number.

72107646687 is a deficient number, since it is larger than the sum of its proper divisors (35698557313).

72107646687 is a wasteful number, since it uses less digits than its factorization.

72107646687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24501527 (or 24501521 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 72107646687 in words is "seventy-two billion, one hundred seven million, six hundred forty-six thousand, six hundred eighty-seven".