816107208904 has 32 divisors (see below), whose sum is σ = 1692446870520. Its totient is φ = 366484732416.

The previous prime is 816107208899. The next prime is 816107208929. The reversal of 816107208904 is 409802701618.

It can be written as a sum of positive squares in 4 ways, for example, as 454677792804 + 361429416100 = 674298^2 + 601190^2 .

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, 106039189 + ... + 106046884.

Almost surely, 2^816107208904 is an apocalyptic number.

It is an amenable number.

816107208904 is an abundant number, since it is smaller than the sum of its proper divisors (876339661616).

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

816107208904 is a wasteful number, since it uses less digits than its factorization.

816107208904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212086129 (or 212086125 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 816107208904 in words is "eight hundred sixteen billion, one hundred seven million, two hundred eight thousand, nine hundred four".