204045657664 has 14 divisors (see below), whose sum is σ = 404903102054. Its totient is φ = 102022828800.

The previous prime is 204045657661. The next prime is 204045657677. The reversal of 204045657664 is 466756540402.

It can be written as a sum of positive squares in only one way, i.e., 103941760000 + 100103897664 = 322400^2 + 316392^2 .

It is not an unprimeable number, because it can be changed into a prime (204045657661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594106637 + ... + 1594106764.

Almost surely, 2^204045657664 is an apocalyptic number.

It is an amenable number.

204045657664 is a deficient number, since it is larger than the sum of its proper divisors (200857444390).

204045657664 is an equidigital number, since it uses as much as digits as its factorization.

204045657664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188213413 (or 3188213403 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 49.

The spelling of 204045657664 in words is "two hundred four billion, forty-five million, six hundred fifty-seven thousand, six hundred sixty-four".