72731533675 has 12 divisors (see below), whose sum is σ = 91328713120. Its totient is φ = 57448703520.

The previous prime is 72731533663. The next prime is 72731533733. The reversal of 72731533675 is 57633513727.

It is not a de Polignac number, because 72731533675 - 2²³ = 72723145067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18411072 + ... + 18415021.

Almost surely, 2^72731533675 is an apocalyptic number.

72731533675 is a deficient number, since it is larger than the sum of its proper divisors (18597179445).

72731533675 is a wasteful number, since it uses less digits than its factorization.

72731533675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36826182 (or 36826177 counting only the distinct ones).

The product of its digits is 2778300, while the sum is 49.

The spelling of 72731533675 in words is "seventy-two billion, seven hundred thirty-one million, five hundred thirty-three thousand, six hundred seventy-five".