72815949610 has 16 divisors (see below), whose sum is σ = 131144024232. Its totient is φ = 29109643200.

The previous prime is 72815949607. The next prime is 72815949629. The reversal of 72815949610 is 1694951827.

It can be written as a sum of positive squares in 4 ways, for example, as 50477956929 + 22337992681 = 224673^2 + 149459^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2073801 + ... + 2108620.

Almost surely, 2^72815949610 is an apocalyptic number.

72815949610 is a deficient number, since it is larger than the sum of its proper divisors (58328074622).

72815949610 is a wasteful number, since it uses less digits than its factorization.

72815949610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184169.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 72815949610 in words is "seventy-two billion, eight hundred fifteen million, nine hundred forty-nine thousand, six hundred ten".