72704778762 has 32 divisors (see below), whose sum is σ = 181289839104. Its totient is φ = 18884358000.

The previous prime is 72704778749. The next prime is 72704778823. The reversal of 72704778762 is 26787740727.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78684364 + ... + 78685287.

It is an arithmetic number, because the mean of its divisors is an integer number (5665307472).

Almost surely, 2^72704778762 is an apocalyptic number.

72704778762 is an abundant number, since it is smaller than the sum of its proper divisors (108585060342).

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

72704778762 is a wasteful number, since it uses less digits than its factorization.

72704778762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157369674.

The product of its (nonzero) digits is 12907776, while the sum is 57.

The spelling of 72704778762 in words is "seventy-two billion, seven hundred four million, seven hundred seventy-eight thousand, seven hundred sixty-two".