10561644456 has 64 divisors (see below), whose sum is σ = 30320524800. Its totient is φ = 3032049600.

The previous prime is 10561644439. The next prime is 10561644463. The reversal of 10561644456 is 65444616501.

It is a happy number.

It is a super-2 number, since 2×10561644456² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047780 + ... + 1057811.

It is an arithmetic number, because the mean of its divisors is an integer number (473758200).

Almost surely, 2^10561644456 is an apocalyptic number.

It is an amenable number.

10561644456 is an abundant number, since it is smaller than the sum of its proper divisors (19758880344).

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

10561644456 is a wasteful number, since it uses less digits than its factorization.

10561644456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105630 (or 2105626 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 10561644456 in words is "ten billion, five hundred sixty-one million, six hundred forty-four thousand, four hundred fifty-six".