126571994413 has 2 divisors, whose sum is σ = 126571994414. Its totient is φ = 126571994412.

The previous prime is 126571994387. The next prime is 126571994443. The reversal of 126571994413 is 314499175621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97567520164 + 29004474249 = 312358^2 + 170307^2 .

It is a cyclic number.

It is not a de Polignac number, because 126571994413 - 2²⁵ = 126538439981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126571994443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63285997206 + 63285997207.

It is an arithmetic number, because the mean of its divisors is an integer number (63285997207).

Almost surely, 2^126571994413 is an apocalyptic number.

It is an amenable number.

126571994413 is a deficient number, since it is larger than the sum of its proper divisors (1).

126571994413 is an equidigital number, since it uses as much as digits as its factorization.

126571994413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The spelling of 126571994413 in words is "one hundred twenty-six billion, five hundred seventy-one million, nine hundred ninety-four thousand, four hundred thirteen".