72204515451 has 40 divisors (see below), whose sum is σ = 108801136224. Its totient is φ = 47718599040.

The previous prime is 72204515447. The next prime is 72204515519. The reversal of 72204515451 is 15451540227.

72204515451 is a `hidden beast` number, since 72 + 2 + 0 + 45 + 1 + 545 + 1 = 666.

It is not a de Polignac number, because 72204515451 - 2² = 72204515447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72204515401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4475866 + ... + 4491968.

Almost surely, 2^72204515451 is an apocalyptic number.

72204515451 is a deficient number, since it is larger than the sum of its proper divisors (36596620773).

72204515451 is a wasteful number, since it uses less digits than its factorization.

72204515451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593 (or 16584 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 72204515451 in words is "seventy-two billion, two hundred four million, five hundred fifteen thousand, four hundred fifty-one".