205981472756 has 12 divisors (see below), whose sum is σ = 360484018692. Its totient is φ = 102986038848.

The previous prime is 205981472731. The next prime is 205981472779. The reversal of 205981472756 is 657274189502.

It can be written as a sum of positive squares in 2 ways, for example, as 57705648400 + 148275824356 = 240220^2 + 385066^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074785 + ... + 1251848.

It is an arithmetic number, because the mean of its divisors is an integer number (30040334891).

Almost surely, 2^205981472756 is an apocalyptic number.

It is an amenable number.

205981472756 is a deficient number, since it is larger than the sum of its proper divisors (154502545936).

205981472756 is a wasteful number, since it uses less digits than its factorization.

205981472756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348770 (or 2348768 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 205981472756 in words is "two hundred five billion, nine hundred eighty-one million, four hundred seventy-two thousand, seven hundred fifty-six".