126440836423 has 4 divisors (see below), whose sum is σ = 137935457928. Its totient is φ = 114946214920.

The previous prime is 126440836409. The next prime is 126440836441. The reversal of 126440836423 is 324638044621.

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

It is a cyclic number.

It is not a de Polignac number, because 126440836423 - 2⁵ = 126440836391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126440836423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126440836493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747310736 + ... + 5747310757.

It is an arithmetic number, because the mean of its divisors is an integer number (34483864482).

Almost surely, 2^126440836423 is an apocalyptic number.

126440836423 is a deficient number, since it is larger than the sum of its proper divisors (11494621505).

126440836423 is a wasteful number, since it uses less digits than its factorization.

126440836423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494621504.

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 126440836423 in words is "one hundred twenty-six billion, four hundred forty million, eight hundred thirty-six thousand, four hundred twenty-three".