999999999904 has 24 divisors (see below), whose sum is σ = 1971764972100. Its totient is φ = 499234292736.

The previous prime is 999999999899. The next prime is 999999999937. The reversal of 999999999904 is 409999999999.

It can be written as a sum of positive squares in 2 ways, for example, as 855158863504 + 144841136400 = 924748^2 + 380580^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23907129 + ... + 23948920.

Almost surely, 2^999999999904 is an apocalyptic number.

It is an amenable number.

999999999904 is a deficient number, since it is larger than the sum of its proper divisors (971764972196).

999999999904 is a wasteful number, since it uses less digits than its factorization.

999999999904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47856712 (or 47856704 counting only the distinct ones).

The product of its (nonzero) digits is 13947137604, while the sum is 94.

The spelling of 999999999904 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred four".