72685685700 has 54 divisors (see below), whose sum is σ = 227829246554. Its totient is φ = 19382849280.

The previous prime is 72685685687. The next prime is 72685685701. The reversal of 72685685700 is 758658627.

72685685700 is a `hidden beast` number, since 7 + 2 + 6 + 8 + 5 + 68 + 570 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1239603264 + 71446082436 = 35208^2 + 267294^2 .

It is not an unprimeable number, because it can be changed into a prime (72685685701) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40380037 + ... + 40381836.

Almost surely, 2^72685685700 is an apocalyptic number.

It is an amenable number.

72685685700 is an abundant number, since it is smaller than the sum of its proper divisors (155143560854).

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

72685685700 is a wasteful number, since it uses less digits than its factorization.

72685685700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80761893 (or 80761883 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 72685685700 in words is "seventy-two billion, six hundred eighty-five million, six hundred eighty-five thousand, seven hundred".