205313413400556 has 24 divisors (see below), whose sum is σ = 492012324006000. Its totient is φ = 66588134075712.

The previous prime is 205313413400507. The next prime is 205313413400581. The reversal of 205313413400556 is 655004314313502.

It is a happy number.

It is a super-2 number, since 2×205313413400556² (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 7 ways as a sum of consecutive naturals, for example, 231208798431 + ... + 231208799318.

It is an arithmetic number, because the mean of its divisors is an integer number (20500513500250).

Almost surely, 2^{205313413400556} is an apocalyptic number.

It is an amenable number.

205313413400556 is an abundant number, since it is smaller than the sum of its proper divisors (286698910605444).

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

205313413400556 is a wasteful number, since it uses less digits than its factorization.

205313413400556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462417597793 (or 462417597791 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 205313413400556 in words is "two hundred five trillion, three hundred thirteen billion, four hundred thirteen million, four hundred thousand, five hundred fifty-six".