561249193168 has 10 divisors (see below), whose sum is σ = 1087420311794. Its totient is φ = 280624596576.

The previous prime is 561249193117. The next prime is 561249193177. The reversal of 561249193168 is 861391942165.

It can be written as a sum of positive squares in only one way, i.e., 436857546304 + 124391646864 = 660952^2 + 352692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17539037271 + ... + 17539037302.

Almost surely, 2^561249193168 is an apocalyptic number.

It is an amenable number.

561249193168 is a deficient number, since it is larger than the sum of its proper divisors (526171118626).

561249193168 is a wasteful number, since it uses less digits than its factorization.

561249193168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35078074581 (or 35078074575 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The spelling of 561249193168 in words is "five hundred sixty-one billion, two hundred forty-nine million, one hundred ninety-three thousand, one hundred sixty-eight".