129099905354 has 24 divisors (see below), whose sum is σ = 225462071808. Its totient is φ = 55280412600.

The previous prime is 129099905327. The next prime is 129099905371. The reversal of 129099905354 is 453509990921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129099905354.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459464 + ... + 685059.

It is an arithmetic number, because the mean of its divisors is an integer number (9394252992).

Almost surely, 2^129099905354 is an apocalyptic number.

129099905354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129099905354 is a deficient number, since it is larger than the sum of its proper divisors (96362166454).

129099905354 is a wasteful number, since it uses less digits than its factorization.

129099905354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145690 (or 1145683 counting only the distinct ones).

The product of its (nonzero) digits is 3936600, while the sum is 56.

The spelling of 129099905354 in words is "one hundred twenty-nine billion, ninety-nine million, nine hundred five thousand, three hundred fifty-four".