205859750397 has 16 divisors (see below), whose sum is σ = 313873375872. Its totient is φ = 117565770240.

The previous prime is 205859750389. The next prime is 205859750417. The reversal of 205859750397 is 793057958502.

It is not a de Polignac number, because 205859750397 - 2³ = 205859750389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205859750397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205859790397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2811868 + ... + 2884149.

It is an arithmetic number, because the mean of its divisors is an integer number (19617085992).

Almost surely, 2^205859750397 is an apocalyptic number.

It is an amenable number.

205859750397 is a deficient number, since it is larger than the sum of its proper divisors (108013625475).

205859750397 is a wasteful number, since it uses less digits than its factorization.

205859750397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697748.

The product of its (nonzero) digits is 23814000, while the sum is 60.

The spelling of 205859750397 in words is "two hundred five billion, eight hundred fifty-nine million, seven hundred fifty thousand, three hundred ninety-seven".