204563121351556 has 12 divisors (see below), whose sum is σ = 390529595307600. Its totient is φ = 92983236977960.

The previous prime is 204563121351509. The next prime is 204563121351577. The reversal of 204563121351556 is 655153121365402.

It is a super-2 number, since 2×204563121351556² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324580924406 + ... + 2324580924493.

It is an arithmetic number, because the mean of its divisors is an integer number (32544132942300).

Almost surely, 2^{204563121351556} is an apocalyptic number.

It is an amenable number.

204563121351556 is a deficient number, since it is larger than the sum of its proper divisors (185966473956044).

204563121351556 is a wasteful number, since it uses less digits than its factorization.

204563121351556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649161848914 (or 4649161848912 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 204563121351556 in words is "two hundred four trillion, five hundred sixty-three billion, one hundred twenty-one million, three hundred fifty-one thousand, five hundred fifty-six".