12256648777 has 6 divisors (see below), whose sum is σ = 12664779594. Its totient is φ = 11861272080.

The previous prime is 12256648753. The next prime is 12256648799. The reversal of 12256648777 is 77784665221.

It can be written as a sum of positive squares in only one way, i.e., 10219390281 + 2037258496 = 101091^2 + 45136^2 .

It is not a de Polignac number, because 12256648777 - 2²³ = 12248260169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12256645777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6376068 + ... + 6377989.

It is an arithmetic number, because the mean of its divisors is an integer number (2110796599).

Almost surely, 2^12256648777 is an apocalyptic number.

It is an amenable number.

12256648777 is a deficient number, since it is larger than the sum of its proper divisors (408130817).

12256648777 is an equidigital number, since it uses as much as digits as its factorization.

12256648777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754119 (or 12754088 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 55.

The spelling of 12256648777 in words is "twelve billion, two hundred fifty-six million, six hundred forty-eight thousand, seven hundred seventy-seven".