126557900359013 has 2 divisors, whose sum is σ = 126557900359014. Its totient is φ = 126557900359012.

The previous prime is 126557900358991. The next prime is 126557900359061. The reversal of 126557900359013 is 310953009755621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119216743124164 + 7341157234849 = 10918642^2 + 2709457^2 .

It is an emirp because it is prime and its reverse (310953009755621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126557900359013 - 2²² = 126557896164709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126557900359013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126557900359073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63278950179506 + 63278950179507.

It is an arithmetic number, because the mean of its divisors is an integer number (63278950179507).

Almost surely, 2^{126557900359013} is an apocalyptic number.

It is an amenable number.

126557900359013 is a deficient number, since it is larger than the sum of its proper divisors (1).

126557900359013 is an equidigital number, since it uses as much as digits as its factorization.

126557900359013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7654500, while the sum is 56.

The spelling of 126557900359013 in words is "one hundred twenty-six trillion, five hundred fifty-seven billion, nine hundred million, three hundred fifty-nine thousand, thirteen".