204864045868 has 24 divisors (see below), whose sum is σ = 369380723040. Its totient is φ = 99370128000.

The previous prime is 204864045839. The next prime is 204864045871. The reversal of 204864045868 is 868540468402.

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, 5410008 + ... + 5447743.

It is an arithmetic number, because the mean of its divisors is an integer number (15390863460).

Almost surely, 2^204864045868 is an apocalyptic number.

It is an amenable number.

204864045868 is a deficient number, since it is larger than the sum of its proper divisors (164516677172).

204864045868 is a wasteful number, since it uses less digits than its factorization.

204864045868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10857897 (or 10857895 counting only the distinct ones).

The product of its (nonzero) digits is 11796480, while the sum is 55.

The spelling of 204864045868 in words is "two hundred four billion, eight hundred sixty-four million, forty-five thousand, eight hundred sixty-eight".