204928644656 has 40 divisors (see below), whose sum is σ = 415078489824. Its totient is φ = 97828093440.

The previous prime is 204928644647. The next prime is 204928644659. The reversal of 204928644656 is 656446829402.

It is not an unprimeable number, because it can be changed into a prime (204928644659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315581 + ... + 713756.

Almost surely, 2^204928644656 is an apocalyptic number.

It is an amenable number.

204928644656 is an abundant number, since it is smaller than the sum of its proper divisors (210149845168).

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

204928644656 is a wasteful number, since it uses less digits than its factorization.

204928644656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029909 (or 1029903 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 56.

The spelling of 204928644656 in words is "two hundred four billion, nine hundred twenty-eight million, six hundred forty-four thousand, six hundred fifty-six".