205506216602610 has 64 divisors (see below), whose sum is σ = 614917302672384. Its totient is φ = 42702590462400.

The previous prime is 205506216602597. The next prime is 205506216602663. The reversal of 205506216602610 is 16206612605502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44481862756 + ... + 44481867375.

It is an arithmetic number, because the mean of its divisors is an integer number (9608082854256).

Almost surely, 2^{205506216602610} is an apocalyptic number.

205506216602610 is an abundant number, since it is smaller than the sum of its proper divisors (409411086069774).

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

205506216602610 is a wasteful number, since it uses less digits than its factorization.

205506216602610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88963730159.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 205506216602610 in words is "two hundred five trillion, five hundred six billion, two hundred sixteen million, six hundred two thousand, six hundred ten".