205664425626 has 64 divisors (see below), whose sum is σ = 472413150720. Its totient is φ = 59033194560.

The previous prime is 205664425583. The next prime is 205664425639. The reversal of 205664425626 is 626524466502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15589405 + ... + 15602591.

It is an arithmetic number, because the mean of its divisors is an integer number (7381455480).

Almost surely, 2^205664425626 is an apocalyptic number.

205664425626 is an abundant number, since it is smaller than the sum of its proper divisors (266748725094).

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

205664425626 is a wasteful number, since it uses less digits than its factorization.

205664425626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25659.

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 205664425626 in words is "two hundred five billion, six hundred sixty-four million, four hundred twenty-five thousand, six hundred twenty-six".