72404326736 has 160 divisors (see below), whose sum is σ = 167736907008. Its totient is φ = 29634232320.

The previous prime is 72404326727. The next prime is 72404326763. The reversal of 72404326736 is 63762340427.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56698130 + ... + 56699406.

Almost surely, 2^72404326736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72404326736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83868453504).

72404326736 is an abundant number, since it is smaller than the sum of its proper divisors (95332580272).

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

72404326736 is a wasteful number, since it uses less digits than its factorization.

72404326736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 44.

The spelling of 72404326736 in words is "seventy-two billion, four hundred four million, three hundred twenty-six thousand, seven hundred thirty-six".