72733812840 has 128 divisors (see below), whose sum is σ = 261095788800. Its totient is φ = 17903704320.

The previous prime is 72733812779. The next prime is 72733812859. The reversal of 72733812840 is 4821833727.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2576196 + ... + 2604275.

It is an arithmetic number, because the mean of its divisors is an integer number (2039810850).

Almost surely, 2^72733812840 is an apocalyptic number.

It is an amenable number.

72733812840 is an abundant number, since it is smaller than the sum of its proper divisors (188361975960).

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

72733812840 is a wasteful number, since it uses less digits than its factorization.

72733812840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180504 (or 5180494 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 72733812840 in words is "seventy-two billion, seven hundred thirty-three million, eight hundred twelve thousand, eight hundred forty".