12556922477789 has 4 divisors (see below), whose sum is σ = 12563425287840. Its totient is φ = 12550419667740.

The previous prime is 12556922477681. The next prime is 12556922477819. The reversal of 12556922477789 is 98777422965521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12556922477789 is a prime.

It is a super-2 number, since 2×12556922477789² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556922476789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251402129 + ... + 3251405990.

It is an arithmetic number, because the mean of its divisors is an integer number (3140856321960).

Almost surely, 2^{12556922477789} is an apocalyptic number.

It is an amenable number.

12556922477789 is a deficient number, since it is larger than the sum of its proper divisors (6502810051).

12556922477789 is an equidigital number, since it uses as much as digits as its factorization.

12556922477789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502810050.

The product of its digits is 1066867200, while the sum is 74.

The spelling of 12556922477789 in words is "twelve trillion, five hundred fifty-six billion, nine hundred twenty-two million, four hundred seventy-seven thousand, seven hundred eighty-nine".