12563383944 has 64 divisors (see below), whose sum is σ = 32645880000. Its totient is φ = 4024177920.

The previous prime is 12563383939. The next prime is 12563383951. The reversal of 12563383944 is 44938336521.

It is a super-2 number, since 2×12563383944² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12563383893 and 12563383902.

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, 104082 + ... + 189630.

It is an arithmetic number, because the mean of its divisors is an integer number (510091875).

Almost surely, 2^12563383944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12563383944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16322940000).

12563383944 is an abundant number, since it is smaller than the sum of its proper divisors (20082496056).

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

12563383944 is a wasteful number, since it uses less digits than its factorization.

12563383944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85798 (or 85794 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The spelling of 12563383944 in words is "twelve billion, five hundred sixty-three million, three hundred eighty-three thousand, nine hundred forty-four".