129423312751 has 4 divisors (see below), whose sum is σ = 130679849872. Its totient is φ = 128166775632.

The previous prime is 129423312749. The next prime is 129423312761. The reversal of 129423312751 is 157213324921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157213324921 = 32413 ⋅4850317.

It is a cyclic number.

It is not a de Polignac number, because 129423312751 - 2¹ = 129423312749 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 (129423312761) 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, 628268406 + ... + 628268611.

It is an arithmetic number, because the mean of its divisors is an integer number (32669962468).

Almost surely, 2^129423312751 is an apocalyptic number.

129423312751 is a deficient number, since it is larger than the sum of its proper divisors (1256537121).

129423312751 is a wasteful number, since it uses less digits than its factorization.

129423312751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256537120.

The product of its digits is 90720, while the sum is 40.

The spelling of 129423312751 in words is "one hundred twenty-nine billion, four hundred twenty-three million, three hundred twelve thousand, seven hundred fifty-one".