129353903525 has 72 divisors (see below), whose sum is σ = 202663195392. Its totient is φ = 80167824000.

The previous prime is 129353903521. The next prime is 129353903527. The reversal of 129353903525 is 525309353921.

It is not a de Polignac number, because 129353903525 - 2² = 129353903521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129353903525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129353903521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3645620 + ... + 3680930.

Almost surely, 2^129353903525 is an apocalyptic number.

It is an amenable number.

129353903525 is a deficient number, since it is larger than the sum of its proper divisors (73309291867).

129353903525 is a wasteful number, since it uses less digits than its factorization.

129353903525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35523 (or 35507 counting only the distinct ones).

The product of its (nonzero) digits is 1093500, while the sum is 47.

The spelling of 129353903525 in words is "one hundred twenty-nine billion, three hundred fifty-three million, nine hundred three thousand, five hundred twenty-five".