12556354663 has 8 divisors (see below), whose sum is σ = 13110731280. Its totient is φ = 12010071360.

The previous prime is 12556354661. The next prime is 12556354697. The reversal of 12556354663 is 36645365521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12556354663 - 2¹ = 12556354661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556354661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020158 + ... + 2026363.

It is an arithmetic number, because the mean of its divisors is an integer number (1638841410).

Almost surely, 2^12556354663 is an apocalyptic number.

12556354663 is a deficient number, since it is larger than the sum of its proper divisors (554376617).

12556354663 is a wasteful number, since it uses less digits than its factorization.

12556354663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046657.

The product of its digits is 1944000, while the sum is 46.

The spelling of 12556354663 in words is "twelve billion, five hundred fifty-six million, three hundred fifty-four thousand, six hundred sixty-three".