12553311561 has 8 divisors (see below), whose sum is σ = 19128855744. Its totient is φ = 7173320880.

The previous prime is 12553311557. The next prime is 12553311607. The reversal of 12553311561 is 16511335521.

12553311561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12553311561 - 2² = 12553311557 is a prime.

It is a super-2 number, since 2×12553311561² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12553311541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298888350 + ... + 298888391.

It is an arithmetic number, because the mean of its divisors is an integer number (2391106968).

Almost surely, 2^12553311561 is an apocalyptic number.

It is an amenable number.

12553311561 is a deficient number, since it is larger than the sum of its proper divisors (6575544183).

12553311561 is an equidigital number, since it uses as much as digits as its factorization.

12553311561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597776751.

The product of its digits is 13500, while the sum is 33.

The spelling of 12553311561 in words is "twelve billion, five hundred fifty-three million, three hundred eleven thousand, five hundred sixty-one".