561336728586656 has 48 divisors (see below), whose sum is σ = 1212817352201280. Its totient is φ = 253625195796480.

The previous prime is 561336728586637. The next prime is 561336728586671. The reversal of 561336728586656 is 656685827633165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4774511921 + ... + 4774629488.

It is an arithmetic number, because the mean of its divisors is an integer number (25267028170860).

Almost surely, 2^{561336728586656} is an apocalyptic number.

It is an amenable number.

561336728586656 is an abundant number, since it is smaller than the sum of its proper divisors (651480623614624).

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

561336728586656 is a wasteful number, since it uses less digits than its factorization.

561336728586656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9549141597 (or 9549141589 counting only the distinct ones).

The product of its digits is 7838208000, while the sum is 77.

The spelling of 561336728586656 in words is "five hundred sixty-one trillion, three hundred thirty-six billion, seven hundred twenty-eight million, five hundred eighty-six thousand, six hundred fifty-six".