129108449925 has 432 divisors, whose sum is σ = 307975824000. Its totient is φ = 51514444800.

The previous prime is 129108449881. The next prime is 129108449971. The reversal of 129108449925 is 529944801921.

129108449925 is a `hidden beast` number, since 1 + 2 + 9 + 108 + 449 + 92 + 5 = 666.

It is not a de Polignac number, because 129108449925 - 2⁶ = 129108449861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 247808665 + ... + 247809185.

It is an arithmetic number, because the mean of its divisors is an integer number (712907000).

Almost surely, 2^129108449925 is an apocalyptic number.

129108449925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129108449925 is an abundant number, since it is smaller than the sum of its proper divisors (178867374075).

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

129108449925 is a wasteful number, since it uses less digits than its factorization.

129108449925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 129108449925 in words is "one hundred twenty-nine billion, one hundred eight million, four hundred forty-nine thousand, nine hundred twenty-five".