12944158261 has 2 divisors, whose sum is σ = 12944158262. Its totient is φ = 12944158260.

The previous prime is 12944158243. The next prime is 12944158313. The reversal of 12944158261 is 16285144921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9978811236 + 2965347025 = 99894^2 + 54455^2 .

It is a cyclic number.

It is not a de Polignac number, because 12944158261 - 2⁷ = 12944158133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12944158561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472079130 + 6472079131.

It is an arithmetic number, because the mean of its divisors is an integer number (6472079131).

Almost surely, 2^12944158261 is an apocalyptic number.

It is an amenable number.

12944158261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12944158261 is an equidigital number, since it uses as much as digits as its factorization.

12944158261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 43.

The spelling of 12944158261 in words is "twelve billion, nine hundred forty-four million, one hundred fifty-eight thousand, two hundred sixty-one".