561520623056 has 20 divisors (see below), whose sum is σ = 1088228690052. Its totient is φ = 280687412736.

The previous prime is 561520623049. The next prime is 561520623071. The reversal of 561520623056 is 650326025165.

It can be written as a sum of positive squares in 2 ways, for example, as 478565102656 + 82955520400 = 691784^2 + 288020^2 .

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, 4492601 + ... + 4615896.

Almost surely, 2^561520623056 is an apocalyptic number.

It is an amenable number.

561520623056 is a deficient number, since it is larger than the sum of its proper divisors (526708066996).

561520623056 is a wasteful number, since it uses less digits than its factorization.

561520623056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112358 (or 9112352 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 561520623056 in words is "five hundred sixty-one billion, five hundred twenty million, six hundred twenty-three thousand, fifty-six".