129512948745 has 16 divisors (see below), whose sum is σ = 207228769920. Its totient is φ = 69070888704.

The previous prime is 129512948717. The next prime is 129512948749. The reversal of 129512948745 is 547849215921.

It is a happy number.

It is not a de Polignac number, because 129512948745 - 2¹⁶ = 129512883209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129512948749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267601 + ... + 575009.

It is an arithmetic number, because the mean of its divisors is an integer number (12951798120).

Almost surely, 2^129512948745 is an apocalyptic number.

129512948745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129512948745 is a deficient number, since it is larger than the sum of its proper divisors (77715821175).

129512948745 is a wasteful number, since it uses less digits than its factorization.

129512948745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335504.

The product of its digits is 7257600, while the sum is 57.

The spelling of 129512948745 in words is "one hundred twenty-nine billion, five hundred twelve million, nine hundred forty-eight thousand, seven hundred forty-five".