205750989790 has 16 divisors (see below), whose sum is σ = 370410191568. Its totient is φ = 82287415936.

The previous prime is 205750989767. The next prime is 205750989823. The reversal of 205750989790 is 97989057502.

It is a congruent number.

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, 1555792 + ... + 1682851.

It is an arithmetic number, because the mean of its divisors is an integer number (23150636973).

Almost surely, 2^205750989790 is an apocalyptic number.

205750989790 is a deficient number, since it is larger than the sum of its proper divisors (164659201778).

205750989790 is a wasteful number, since it uses less digits than its factorization.

205750989790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245003.

The product of its (nonzero) digits is 14288400, while the sum is 61.

The spelling of 205750989790 in words is "two hundred five billion, seven hundred fifty million, nine hundred eighty-nine thousand, seven hundred ninety".