72687436944 has 40 divisors (see below), whose sum is σ = 197658822240. Its totient is φ = 22953927168.

The previous prime is 72687436937. The next prime is 72687436957. The reversal of 72687436944 is 44963478627.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39849657 + ... + 39851480.

It is an arithmetic number, because the mean of its divisors is an integer number (4941470556).

Almost surely, 2^72687436944 is an apocalyptic number.

It is an amenable number.

72687436944 is an abundant number, since it is smaller than the sum of its proper divisors (124971385296).

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

72687436944 is a wasteful number, since it uses less digits than its factorization.

72687436944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79701167 (or 79701161 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 60.

The spelling of 72687436944 in words is "seventy-two billion, six hundred eighty-seven million, four hundred thirty-six thousand, nine hundred forty-four".