126613313591 has 2 divisors, whose sum is σ = 126613313592. Its totient is φ = 126613313590.

The previous prime is 126613313579. The next prime is 126613313611. The reversal of 126613313591 is 195313316621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126613313591 - 2³⁰ = 125539571767 is a prime.

It is a super-4 number, since 4×126613313591⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126613313521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63306656795 + 63306656796.

It is an arithmetic number, because the mean of its divisors is an integer number (63306656796).

Almost surely, 2^126613313591 is an apocalyptic number.

126613313591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126613313591 is an equidigital number, since it uses as much as digits as its factorization.

126613313591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The spelling of 126613313591 in words is "one hundred twenty-six billion, six hundred thirteen million, three hundred thirteen thousand, five hundred ninety-one".