561255673064836 has 12 divisors (see below), whose sum is σ = 982197781053580. Its totient is φ = 280627735620960.

The previous prime is 561255673064813. The next prime is 561255673064893. The reversal of 561255673064836 is 638460376552165.

It can be written as a sum of positive squares in 2 ways, for example, as 345421553670400 + 215834119394436 = 18585520^2 + 14691294^2 .

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, 11935491 + ... + 35566378.

Almost surely, 2^{561255673064836} is an apocalyptic number.

It is an amenable number.

561255673064836 is a deficient number, since it is larger than the sum of its proper divisors (420942107988744).

561255673064836 is a wasteful number, since it uses less digits than its factorization.

561255673064836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50455734 (or 50455732 counting only the distinct ones).

The product of its (nonzero) digits is 653184000, while the sum is 67.

The spelling of 561255673064836 in words is "five hundred sixty-one trillion, two hundred fifty-five billion, six hundred seventy-three million, sixty-four thousand, eight hundred thirty-six".