129097955990 has 16 divisors (see below), whose sum is σ = 232413738480. Its totient is φ = 51630867360.

The previous prime is 129097955981. The next prime is 129097956017. The reversal of 129097955990 is 99559790921.

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, 973976 + ... + 1098555.

It is an arithmetic number, because the mean of its divisors is an integer number (14525858655).

Almost surely, 2^129097955990 is an apocalyptic number.

129097955990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129097955990 is a deficient number, since it is larger than the sum of its proper divisors (103315782490).

129097955990 is a wasteful number, since it uses less digits than its factorization.

129097955990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078767.

The product of its (nonzero) digits is 20667150, while the sum is 65.

The spelling of 129097955990 in words is "one hundred twenty-nine billion, ninety-seven million, nine hundred fifty-five thousand, nine hundred ninety".