129811963707 has 24 divisors (see below), whose sum is σ = 190270529280. Its totient is φ = 85267034160.

The previous prime is 129811963703. The next prime is 129811963741. The reversal of 129811963707 is 707369118921.

It is a happy number.

129811963707 is a `hidden beast` number, since 1 + 2 + 9 + 81 + 196 + 370 + 7 = 666.

It is not a de Polignac number, because 129811963707 - 2² = 129811963703 is a prime.

It is a super-2 number, since 2×129811963707² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129811963703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 931048 + ... + 1061354.

It is an arithmetic number, because the mean of its divisors is an integer number (7927938720).

Almost surely, 2^129811963707 is an apocalyptic number.

129811963707 is a deficient number, since it is larger than the sum of its proper divisors (60458565573).

129811963707 is a wasteful number, since it uses less digits than its factorization.

129811963707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131943 (or 131940 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 129811963707 in words is "one hundred twenty-nine billion, eight hundred eleven million, nine hundred sixty-three thousand, seven hundred seven".