204121631264 has 24 divisors (see below), whose sum is σ = 402232875408. Its totient is φ = 101967250240.

The previous prime is 204121631261. The next prime is 204121631297. The reversal of 204121631264 is 462136121402.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 204121631264.

It is not an unprimeable number, because it can be changed into a prime (204121631261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2888462 + ... + 2958285.

It is an arithmetic number, because the mean of its divisors is an integer number (16759703142).

Almost surely, 2^204121631264 is an apocalyptic number.

It is an amenable number.

204121631264 is a deficient number, since it is larger than the sum of its proper divisors (198111244144).

204121631264 is a wasteful number, since it uses less digits than its factorization.

204121631264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847848 (or 5847840 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 204121631264 its reverse (462136121402), we get a palindrome (666257752666).

The spelling of 204121631264 in words is "two hundred four billion, one hundred twenty-one million, six hundred thirty-one thousand, two hundred sixty-four".