126558815013959 has 4 divisors (see below), whose sum is σ = 126636126448104. Its totient is φ = 126481503579816.

The previous prime is 126558815013949. The next prime is 126558815013991. The reversal of 126558815013959 is 959310518855621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126558815013959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126558815013949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38655714617 + ... + 38655717890.

It is an arithmetic number, because the mean of its divisors is an integer number (31659031612026).

Almost surely, 2^{126558815013959} is an apocalyptic number.

126558815013959 is a deficient number, since it is larger than the sum of its proper divisors (77311434145).

126558815013959 is an equidigital number, since it uses as much as digits as its factorization.

126558815013959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77311434144.

The product of its (nonzero) digits is 116640000, while the sum is 68.

The spelling of 126558815013959 in words is "one hundred twenty-six trillion, five hundred fifty-eight billion, eight hundred fifteen million, thirteen thousand, nine hundred fifty-nine".