129515751994 has 16 divisors (see below), whose sum is σ = 204532375680. Its totient is φ = 61339420800.

The previous prime is 129515751923. The next prime is 129515752031. The reversal of 129515751994 is 499157515921.

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, 46482 + ... + 511069.

It is an arithmetic number, because the mean of its divisors is an integer number (12783273480).

Almost surely, 2^129515751994 is an apocalyptic number.

129515751994 is a deficient number, since it is larger than the sum of its proper divisors (75016623686).

129515751994 is a wasteful number, since it uses less digits than its factorization.

129515751994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563685.

The product of its digits is 5103000, while the sum is 58.

The spelling of 129515751994 in words is "one hundred twenty-nine billion, five hundred fifteen million, seven hundred fifty-one thousand, nine hundred ninety-four".