129712906872 has 40 divisors (see below), whose sum is σ = 363316245600. Its totient is φ = 43237635408.

The previous prime is 129712906867. The next prime is 129712906877. The reversal of 129712906872 is 278609217921.

129712906872 is a `hidden beast` number, since 1 + 297 + 1 + 290 + 68 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (129712906867) and next prime (129712906877).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129712906877) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 100086472 + ... + 100087767.

It is an arithmetic number, because the mean of its divisors is an integer number (9082906140).

Almost surely, 2^129712906872 is an apocalyptic number.

129712906872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129712906872 is an abundant number, since it is smaller than the sum of its proper divisors (233603338728).

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

129712906872 is a wasteful number, since it uses less digits than its factorization.

129712906872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200174257 (or 200174244 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 129712906872 in words is "one hundred twenty-nine billion, seven hundred twelve million, nine hundred six thousand, eight hundred seventy-two".