204312111564 has 48 divisors (see below), whose sum is σ = 520095534336. Its totient is φ = 61909387200.

The previous prime is 204312111539. The next prime is 204312111599. The reversal of 204312111564 is 465111213402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3532809 + ... + 3590175.

It is an arithmetic number, because the mean of its divisors is an integer number (10835323632).

Almost surely, 2^204312111564 is an apocalyptic number.

It is an amenable number.

204312111564 is an abundant number, since it is smaller than the sum of its proper divisors (315783422772).

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

204312111564 is a wasteful number, since it uses less digits than its factorization.

204312111564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84366 (or 84364 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 204312111564 its reverse (465111213402), we get a palindrome (669423324966).

The spelling of 204312111564 in words is "two hundred four billion, three hundred twelve million, one hundred eleven thousand, five hundred sixty-four".