72317632812 has 12 divisors (see below), whose sum is σ = 168741143256. Its totient is φ = 24105877600.

The previous prime is 72317632811. The next prime is 72317632831. The reversal of 72317632812 is 21823671327.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (72317632811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3013234689 + ... + 3013234712.

It is an arithmetic number, because the mean of its divisors is an integer number (14061761938).

Almost surely, 2^72317632812 is an apocalyptic number.

It is an amenable number.

72317632812 is an abundant number, since it is smaller than the sum of its proper divisors (96423510444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72317632812 is a wasteful number, since it uses less digits than its factorization.

72317632812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026469408 (or 6026469406 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The spelling of 72317632812 in words is "seventy-two billion, three hundred seventeen million, six hundred thirty-two thousand, eight hundred twelve".