204664512620 has 48 divisors (see below), whose sum is σ = 431124395520. Its totient is φ = 81613054656.

The previous prime is 204664512571. The next prime is 204664512649. The reversal of 204664512620 is 26215466402.

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, 9225101 + ... + 9247259.

It is an arithmetic number, because the mean of its divisors is an integer number (8981758240).

Almost surely, 2^204664512620 is an apocalyptic number.

204664512620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204664512620 is an abundant number, since it is smaller than the sum of its proper divisors (226459882900).

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

204664512620 is a wasteful number, since it uses less digits than its factorization.

204664512620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23574 (or 23572 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 204664512620 in words is "two hundred four billion, six hundred sixty-four million, five hundred twelve thousand, six hundred twenty".