126251679317 has 4 divisors (see below), whose sum is σ = 127849801920. Its totient is φ = 124653556716.

The previous prime is 126251679271. The next prime is 126251679329. The reversal of 126251679317 is 713976152621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126251679317 - 2²⁶ = 126184570453 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 (126251679377) 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, 799061183 + ... + 799061340.

It is an arithmetic number, because the mean of its divisors is an integer number (31962450480).

Almost surely, 2^126251679317 is an apocalyptic number.

It is an amenable number.

126251679317 is a deficient number, since it is larger than the sum of its proper divisors (1598122603).

126251679317 is an equidigital number, since it uses as much as digits as its factorization.

126251679317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598122602.

The product of its digits is 952560, while the sum is 50.

The spelling of 126251679317 in words is "one hundred twenty-six billion, two hundred fifty-one million, six hundred seventy-nine thousand, three hundred seventeen".