129123964871426 has 16 divisors (see below), whose sum is σ = 234376272372096. Its totient is φ = 52083616082496.

The previous prime is 129123964871401. The next prime is 129123964871501. The reversal of 129123964871426 is 624178469321921.

It is a super-2 number, since 2×129123964871426² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271268833526 + ... + 271268834001.

It is an arithmetic number, because the mean of its divisors is an integer number (14648517023256).

Almost surely, 2^{129123964871426} is an apocalyptic number.

129123964871426 is a deficient number, since it is larger than the sum of its proper divisors (105252307500670).

129123964871426 is a wasteful number, since it uses less digits than its factorization.

129123964871426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542537667553.

The product of its digits is 62705664, while the sum is 65.

The spelling of 129123964871426 in words is "one hundred twenty-nine trillion, one hundred twenty-three billion, nine hundred sixty-four million, eight hundred seventy-one thousand, four hundred twenty-six".