129798407724525 has 18 divisors (see below), whose sum is σ = 232483370280330. Its totient is φ = 69225817452960.

The previous prime is 129798407724521. The next prime is 129798407724533. The reversal of 129798407724525 is 525427704897921.

129798407724525 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 9 + 8 + 4 + 0 + 77 + 24 + 525 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1531502776521 + 128266904948004 = 1237539^2 + 11325498^2 .

It is not a de Polignac number, because 129798407724525 - 2² = 129798407724521 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129798407724521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 288440905830 + ... + 288440906279.

Almost surely, 2^{129798407724525} is an apocalyptic number.

129798407724525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129798407724525 is a deficient number, since it is larger than the sum of its proper divisors (102684962555805).

129798407724525 is a wasteful number, since it uses less digits than its factorization.

129798407724525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576881812125 (or 576881812117 counting only the distinct ones).

The product of its (nonzero) digits is 711244800, while the sum is 72.

The spelling of 129798407724525 in words is "one hundred twenty-nine trillion, seven hundred ninety-eight billion, four hundred seven million, seven hundred twenty-four thousand, five hundred twenty-five".