205368508986 has 64 divisors (see below), whose sum is σ = 434322577920. Its totient is φ = 64558607040.

The previous prime is 205368508979. The next prime is 205368508987. The reversal of 205368508986 is 689805863502.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205368508987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30689901 + ... + 30696591.

It is an arithmetic number, because the mean of its divisors is an integer number (6786290280).

Almost surely, 2^205368508986 is an apocalyptic number.

205368508986 is an abundant number, since it is smaller than the sum of its proper divisors (228954068934).

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

205368508986 is a wasteful number, since it uses less digits than its factorization.

205368508986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899.

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 205368508986 in words is "two hundred five billion, three hundred sixty-eight million, five hundred eight thousand, nine hundred eighty-six".