126686407679 has 4 divisors (see below), whose sum is σ = 136431515976. Its totient is φ = 116941299384.

The previous prime is 126686407667. The next prime is 126686407697. The reversal of 126686407679 is 976704686621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976704686621 = 1123 ⋅869728127.

It is not a de Polignac number, because 126686407679 - 2⁸ = 126686407423 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 (126686407699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4872554129 + ... + 4872554154.

It is an arithmetic number, because the mean of its divisors is an integer number (34107878994).

Almost surely, 2^126686407679 is an apocalyptic number.

126686407679 is a deficient number, since it is larger than the sum of its proper divisors (9745108297).

126686407679 is an equidigital number, since it uses as much as digits as its factorization.

126686407679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745108296.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 126686407679 in words is "one hundred twenty-six billion, six hundred eighty-six million, four hundred seven thousand, six hundred seventy-nine".