12255956917 has 2 divisors, whose sum is σ = 12255956918. Its totient is φ = 12255956916.

The previous prime is 12255956903. The next prime is 12255956929. The reversal of 12255956917 is 71965955221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6302136996 + 5953819921 = 79386^2 + 77161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12255956917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12255956957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6127978458 + 6127978459.

It is an arithmetic number, because the mean of its divisors is an integer number (6127978459).

Almost surely, 2^12255956917 is an apocalyptic number.

12255956917 is the 63917-th hex number.

It is an amenable number.

12255956917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12255956917 is an equidigital number, since it uses as much as digits as its factorization.

12255956917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701000, while the sum is 52.

The spelling of 12255956917 in words is "twelve billion, two hundred fifty-five million, nine hundred fifty-six thousand, nine hundred seventeen".