205939087850 has 12 divisors (see below), whose sum is σ = 383046703494. Its totient is φ = 82375635120.

The previous prime is 205939087829. The next prime is 205939087919. The reversal of 205939087850 is 58780939502.

It can be written as a sum of positive squares in 3 ways, for example, as 190363798249 + 15575289601 = 436307^2 + 124801^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2059390829 + ... + 2059390928.

Almost surely, 2^205939087850 is an apocalyptic number.

205939087850 is a deficient number, since it is larger than the sum of its proper divisors (177107615644).

205939087850 is a wasteful number, since it uses less digits than its factorization.

205939087850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118781769 (or 4118781764 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 205939087850 in words is "two hundred five billion, nine hundred thirty-nine million, eighty-seven thousand, eight hundred fifty".