129279250038 has 16 divisors (see below), whose sum is σ = 259491927600. Its totient is φ = 42937512096.

The previous prime is 129279250019. The next prime is 129279250091. The reversal of 129279250038 is 830052972921.

It is a Curzon number.

It is a congruent number.

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, 38891013 + ... + 38894336.

It is an arithmetic number, because the mean of its divisors is an integer number (16218245475).

Almost surely, 2^129279250038 is an apocalyptic number.

129279250038 is an abundant number, since it is smaller than the sum of its proper divisors (130212677562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129279250038 is a wasteful number, since it uses less digits than its factorization.

129279250038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77785631.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 129279250038 in words is "one hundred twenty-nine billion, two hundred seventy-nine million, two hundred fifty thousand, thirty-eight".