204621015564625 has 16 divisors (see below), whose sum is σ = 278582211737856. Its totient is φ = 148815284046000.

The previous prime is 204621015564619. The next prime is 204621015564653. The reversal of 204621015564625 is 526465510126402.

It is not a de Polignac number, because 204621015564625 - 2¹⁵ = 204621015531857 is a prime.

It is a Duffinian number.

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, 74407640649 + ... + 74407643398.

It is an arithmetic number, because the mean of its divisors is an integer number (17411388233616).

Almost surely, 2^{204621015564625} is an apocalyptic number.

204621015564625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204621015564625 is a deficient number, since it is larger than the sum of its proper divisors (73961196173231).

204621015564625 is a wasteful number, since it uses less digits than its factorization.

204621015564625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148815284073 (or 148815284063 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 204621015564625 in words is "two hundred four trillion, six hundred twenty-one billion, fifteen million, five hundred sixty-four thousand, six hundred twenty-five".