561636330636 has 12 divisors (see below), whose sum is σ = 1310484771512. Its totient is φ = 187212110208.

The previous prime is 561636330623. The next prime is 561636330637. The reversal of 561636330636 is 636033636165.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (561636330637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23401513765 + ... + 23401513788.

Almost surely, 2^561636330636 is an apocalyptic number.

It is an amenable number.

561636330636 is an abundant number, since it is smaller than the sum of its proper divisors (748848440876).

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

561636330636 is a wasteful number, since it uses less digits than its factorization.

561636330636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46803027560 (or 46803027558 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 48.

The spelling of 561636330636 in words is "five hundred sixty-one billion, six hundred thirty-six million, three hundred thirty thousand, six hundred thirty-six".