12553312563 has 48 divisors (see below), whose sum is σ = 20662237440. Its totient is φ = 7274232000.

The previous prime is 12553312537. The next prime is 12553312571. The reversal of 12553312563 is 36521335521.

12553312563 is a `hidden beast` number, since 1 + 2 + 55 + 33 + 12 + 563 = 666.

It is not a de Polignac number, because 12553312563 - 2¹⁰ = 12553311539 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 (12553312963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 274488 + ... + 316938.

It is an arithmetic number, because the mean of its divisors is an integer number (430463280).

Almost surely, 2^12553312563 is an apocalyptic number.

12553312563 is a deficient number, since it is larger than the sum of its proper divisors (8108924877).

12553312563 is a wasteful number, since it uses less digits than its factorization.

12553312563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42600 (or 42597 counting only the distinct ones).

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

The spelling of 12553312563 in words is "twelve billion, five hundred fifty-three million, three hundred twelve thousand, five hundred sixty-three".