205705972936904 has 32 divisors (see below), whose sum is σ = 422033402377440. Its totient is φ = 93220229414400.

The previous prime is 205705972936861. The next prime is 205705972936913. The reversal of 205705972936904 is 409639279507502.

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, 3531040169 + ... + 3531098424.

It is an arithmetic number, because the mean of its divisors is an integer number (13188543824295).

Almost surely, 2^{205705972936904} is an apocalyptic number.

It is an amenable number.

205705972936904 is an abundant number, since it is smaller than the sum of its proper divisors (216327429440536).

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

205705972936904 is a wasteful number, since it uses less digits than its factorization.

205705972936904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062138941 (or 7062138937 counting only the distinct ones).

The product of its (nonzero) digits is 257191200, while the sum is 68.

The spelling of 205705972936904 in words is "two hundred five trillion, seven hundred five billion, nine hundred seventy-two million, nine hundred thirty-six thousand, nine hundred four".