205751830830 has 64 divisors (see below), whose sum is σ = 607759262208. Its totient is φ = 43411374720.

The previous prime is 205751830829. The next prime is 205751830847. The reversal of 205751830830 is 38038157502.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 37680756 + ... + 37686215.

It is an arithmetic number, because the mean of its divisors is an integer number (9496238472).

Almost surely, 2^205751830830 is an apocalyptic number.

205751830830 is an abundant number, since it is smaller than the sum of its proper divisors (402007431378).

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

205751830830 is a wasteful number, since it uses less digits than its factorization.

205751830830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75367001.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 205751830830 in words is "two hundred five billion, seven hundred fifty-one million, eight hundred thirty thousand, eight hundred thirty".