129531908472 has 16 divisors (see below), whose sum is σ = 323829771240. Its totient is φ = 43177302816.

The previous prime is 129531908447. The next prime is 129531908477. The reversal of 129531908472 is 274809135921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129531908477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698581403 + ... + 2698581450.

Almost surely, 2^129531908472 is an apocalyptic number.

129531908472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129531908472 is an abundant number, since it is smaller than the sum of its proper divisors (194297862768).

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

129531908472 is a wasteful number, since it uses less digits than its factorization.

129531908472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397162862 (or 5397162858 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 129531908472 in words is "one hundred twenty-nine billion, five hundred thirty-one million, nine hundred eight thousand, four hundred seventy-two".