129538959118 has 4 divisors (see below), whose sum is σ = 194308438680. Its totient is φ = 64769479558.

The previous prime is 129538959103. The next prime is 129538959127. The reversal of 129538959118 is 811959835921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811959835921 = 13 ⋅62458448917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32384739778 + ... + 32384739781.

It is an arithmetic number, because the mean of its divisors is an integer number (48577109670).

Almost surely, 2^129538959118 is an apocalyptic number.

129538959118 is a deficient number, since it is larger than the sum of its proper divisors (64769479562).

129538959118 is an equidigital number, since it uses as much as digits as its factorization.

129538959118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64769479561.

The product of its digits is 6998400, while the sum is 61.

The spelling of 129538959118 in words is "one hundred twenty-nine billion, five hundred thirty-eight million, nine hundred fifty-nine thousand, one hundred eighteen".