129409958734 has 12 divisors (see below), whose sum is σ = 225807173064. Its totient is φ = 55461410844.

The previous prime is 129409958723. The next prime is 129409958767. The reversal of 129409958734 is 437859904921.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 660254794 + ... + 660254989.

It is an arithmetic number, because the mean of its divisors is an integer number (18817264422).

Almost surely, 2^129409958734 is an apocalyptic number.

129409958734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129409958734 is a deficient number, since it is larger than the sum of its proper divisors (96397214330).

129409958734 is a wasteful number, since it uses less digits than its factorization.

129409958734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320509799 (or 1320509792 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 129409958734 in words is "one hundred twenty-nine billion, four hundred nine million, nine hundred fifty-eight thousand, seven hundred thirty-four".