999851477904 has 60 divisors (see below), whose sum is σ = 2799981789696. Its totient is φ = 333071061696.

The previous prime is 999851477903. The next prime is 999851477909. The reversal of 999851477904 is 409774158999.

999851477904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (999851477903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1989864 + ... + 2441159.

Almost surely, 2^999851477904 is an apocalyptic number.

It is an amenable number.

999851477904 is an abundant number, since it is smaller than the sum of its proper divisors (1800130311792).

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

999851477904 is a wasteful number, since it uses less digits than its factorization.

999851477904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432604 (or 4432595 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 72.

The spelling of 999851477904 in words is "nine hundred ninety-nine billion, eight hundred fifty-one million, four hundred seventy-seven thousand, nine hundred four".