129976699608 has 48 divisors (see below), whose sum is σ = 402308833680. Its totient is φ = 37136199744.

The previous prime is 129976699603. The next prime is 129976699679. The reversal of 129976699608 is 806996679921.

129976699608 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 7 + 6 + 6 + 9 + 9 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129976699603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128944635 + ... + 128945642.

It is an arithmetic number, because the mean of its divisors is an integer number (8381434035).

Almost surely, 2^129976699608 is an apocalyptic number.

129976699608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129976699608 is an abundant number, since it is smaller than the sum of its proper divisors (272332134072).

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

129976699608 is a wasteful number, since it uses less digits than its factorization.

129976699608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257890296 (or 257890289 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 72.

The spelling of 129976699608 in words is "one hundred twenty-nine billion, nine hundred seventy-six million, six hundred ninety-nine thousand, six hundred eight".