205753801894 has 16 divisors (see below), whose sum is σ = 319385383920. Its totient is φ = 99294501600.

The previous prime is 205753801871. The next prime is 205753801901. The reversal of 205753801894 is 498108357502.

It is a happy number.

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, 456789 + ... + 787504.

It is an arithmetic number, because the mean of its divisors is an integer number (19961586495).

Almost surely, 2^205753801894 is an apocalyptic number.

205753801894 is a deficient number, since it is larger than the sum of its proper divisors (113631582026).

205753801894 is a wasteful number, since it uses less digits than its factorization.

205753801894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247175.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 205753801894 in words is "two hundred five billion, seven hundred fifty-three million, eight hundred one thousand, eight hundred ninety-four".