129715631712 has 144 divisors (see below), whose sum is σ = 386841283920. Its totient is φ = 42752489472.

The previous prime is 129715631701. The next prime is 129715631719. The reversal of 129715631712 is 217136517921.

129715631712 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 1 + 5 + 631 + 7 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×129715631712² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129715631719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598348 + ... + 785780.

It is an arithmetic number, because the mean of its divisors is an integer number (2686397805).

Almost surely, 2^129715631712 is an apocalyptic number.

129715631712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129715631712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193420641960).

129715631712 is an abundant number, since it is smaller than the sum of its proper divisors (257125652208).

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

129715631712 is an equidigital number, since it uses as much as digits as its factorization.

129715631712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187547 (or 187527 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The spelling of 129715631712 in words is "one hundred twenty-nine billion, seven hundred fifteen million, six hundred thirty-one thousand, seven hundred twelve".