12563551323 has 12 divisors (see below), whose sum is σ = 18188322360. Its totient is φ = 8356791456.

The previous prime is 12563551313. The next prime is 12563551333. The reversal of 12563551323 is 32315536521.

12563551323 is a `hidden beast` number, since 1 + 2 + 5 + 635 + 5 + 13 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (12563551313) and next prime (12563551333).

It is not a de Polignac number, because 12563551323 - 2⁸ = 12563551067 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (12563551313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1571578 + ... + 1579551.

It is an arithmetic number, because the mean of its divisors is an integer number (1515693530).

Almost surely, 2^12563551323 is an apocalyptic number.

12563551323 is a deficient number, since it is larger than the sum of its proper divisors (5624771037).

12563551323 is a wasteful number, since it uses less digits than its factorization.

12563551323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151578 (or 3151575 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 12563551323 in words is "twelve billion, five hundred sixty-three million, five hundred fifty-one thousand, three hundred twenty-three".