129209254625 has 16 divisors (see below), whose sum is σ = 175912528896. Its totient is φ = 93970366000.

The previous prime is 129209254609. The next prime is 129209254639. The reversal of 129209254625 is 526452902921.

It is not a de Polignac number, because 129209254625 - 2⁴ = 129209254609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129209254625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46983809 + ... + 46986558.

It is an arithmetic number, because the mean of its divisors is an integer number (10994533056).

Almost surely, 2^129209254625 is an apocalyptic number.

It is an amenable number.

129209254625 is a deficient number, since it is larger than the sum of its proper divisors (46703274271).

129209254625 is an equidigital number, since it uses as much as digits as its factorization.

129209254625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93970393 (or 93970383 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 129209254625 in words is "one hundred twenty-nine billion, two hundred nine million, two hundred fifty-four thousand, six hundred twenty-five".