205900954556 has 48 divisors (see below), whose sum is σ = 415200242688. Its totient is φ = 88465910400.

The previous prime is 205900954543. The next prime is 205900954573. The reversal of 205900954556 is 655459009502.

It is a congruent 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, 1696625 + ... + 1813928.

It is an arithmetic number, because the mean of its divisors is an integer number (8650005056).

Almost surely, 2^205900954556 is an apocalyptic number.

It is an amenable number.

205900954556 is an abundant number, since it is smaller than the sum of its proper divisors (209299288132).

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

205900954556 is a wasteful number, since it uses less digits than its factorization.

205900954556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510642 (or 3510640 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 205900954556 in words is "two hundred five billion, nine hundred million, nine hundred fifty-four thousand, five hundred fifty-six".