12643601255431 has 2 divisors, whose sum is σ = 12643601255432. Its totient is φ = 12643601255430.

The previous prime is 12643601255357. The next prime is 12643601255459. The reversal of 12643601255431 is 13455210634621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12643601255431 - 2¹³ = 12643601247239 is a prime.

It is a super-2 number, since 2×12643601255431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12643601255731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321800627715 + 6321800627716.

It is an arithmetic number, because the mean of its divisors is an integer number (6321800627716).

Almost surely, 2^{12643601255431} is an apocalyptic number.

12643601255431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12643601255431 is an equidigital number, since it uses as much as digits as its factorization.

12643601255431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 12643601255431 in words is "twelve trillion, six hundred forty-three billion, six hundred one million, two hundred fifty-five thousand, four hundred thirty-one".