129426506525 has 12 divisors (see below), whose sum is σ = 160823932800. Its totient is φ = 103325034480.

The previous prime is 129426506509. The next prime is 129426506537. The reversal of 129426506525 is 525605624921.

It is not a de Polignac number, because 129426506525 - 2⁴ = 129426506509 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129426506525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5392055 + ... + 5416004.

It is an arithmetic number, because the mean of its divisors is an integer number (13401994400).

Almost surely, 2^129426506525 is an apocalyptic number.

It is an amenable number.

129426506525 is a deficient number, since it is larger than the sum of its proper divisors (31397426275).

129426506525 is a wasteful number, since it uses less digits than its factorization.

129426506525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10808548 (or 10808543 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 129426506525 in words is "one hundred twenty-nine billion, four hundred twenty-six million, five hundred six thousand, five hundred twenty-five".