12563271396 has 135 divisors (see below), whose sum is σ = 35637984921. Its totient is φ = 3857551776.

The previous prime is 12563271353. The next prime is 12563271397. The reversal of 12563271396 is 69317236521.

The square root of 12563271396 is 112086.

It is a perfect power (a square), and thus also a powerful number.

12563271396 is a `hidden beast` number, since 1 + 2 + 5 + 632 + 7 + 1 + 3 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1858472100 + 10704799296 = 43110^2 + 103464^2 .

It is not an unprimeable number, because it can be changed into a prime (12563271397) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 26227885 + ... + 26228363.

Almost surely, 2^12563271396 is an apocalyptic number.

12563271396 is the 112086-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12563271396

12563271396 is an abundant number, since it is smaller than the sum of its proper divisors (23074713525).

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

12563271396 is an equidigital number, since it uses as much as digits as its factorization.

12563271396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 497 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 12563271396 in words is "twelve billion, five hundred sixty-three million, two hundred seventy-one thousand, three hundred ninety-six".