72717734236 has 48 divisors (see below), whose sum is σ = 146847960000. Its totient is φ = 30862540800.

The previous prime is 72717734227. The next prime is 72717734263. The reversal of 72717734236 is 63243771727.

It is a self number, because there is not a number n which added to its sum of digits gives 72717734236.

It is a congruent 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, 3942636 + ... + 3961036.

It is an arithmetic number, because the mean of its divisors is an integer number (3059332500).

Almost surely, 2^72717734236 is an apocalyptic number.

It is an amenable number.

72717734236 is an abundant number, since it is smaller than the sum of its proper divisors (74130225764).

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

72717734236 is a wasteful number, since it uses less digits than its factorization.

72717734236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19774 (or 19772 counting only the distinct ones).

The product of its digits is 2074464, while the sum is 49.

The spelling of 72717734236 in words is "seventy-two billion, seven hundred seventeen million, seven hundred thirty-four thousand, two hundred thirty-six".