12563939621376 has 960 divisors, whose sum is σ = 44292416103936. Its totient is φ = 3505246617600.

The previous prime is 12563939621347. The next prime is 12563939621383. The reversal of 12563939621376 is 67312693936521.

12563939621376 is a `hidden beast` number, since 1 + 2 + 56 + 393 + 9 + 62 + 137 + 6 = 666.

It is a super-2 number, since 2×12563939621376² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9731943291 + ... + 9731944581.

Almost surely, 2^{12563939621376} is an apocalyptic number.

12563939621376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12563939621376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22146208051968).

12563939621376 is an abundant number, since it is smaller than the sum of its proper divisors (31728476482560).

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

12563939621376 is a wasteful number, since it uses less digits than its factorization.

12563939621376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1867 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 63.

The spelling of 12563939621376 in words is "twelve trillion, five hundred sixty-three billion, nine hundred thirty-nine million, six hundred twenty-one thousand, three hundred seventy-six".