129724013972 has 24 divisors (see below), whose sum is σ = 267817320960. Its totient is φ = 53802586080.

The previous prime is 129724013927. The next prime is 129724014031. The reversal of 129724013972 is 279310427921.

129724013972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 74724947 + ... + 74726682.

It is an arithmetic number, because the mean of its divisors is an integer number (11159055040).

Almost surely, 2^129724013972 is an apocalyptic number.

It is an amenable number.

129724013972 is an abundant number, since it is smaller than the sum of its proper divisors (138093306988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129724013972 is a wasteful number, since it uses less digits than its factorization.

129724013972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149451671 (or 149451669 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 129724013972 in words is "one hundred twenty-nine billion, seven hundred twenty-four million, thirteen thousand, nine hundred seventy-two".