129073837825 has 12 divisors (see below), whose sum is σ = 160261899948. Its totient is φ = 103123366400.

The previous prime is 129073837787. The next prime is 129073837829. The reversal of 129073837825 is 528738370921.

It can be written as a sum of positive squares in 6 ways, for example, as 28237105521 + 100836732304 = 168039^2 + 317548^2 .

It is not a de Polignac number, because 129073837825 - 2¹¹ = 129073835777 is a prime.

It is a super-2 number, since 2×129073837825² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129073837829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3373192 + ... + 3411241.

It is an arithmetic number, because the mean of its divisors is an integer number (13355158329).

Almost surely, 2^129073837825 is an apocalyptic number.

It is an amenable number.

129073837825 is a deficient number, since it is larger than the sum of its proper divisors (31188062123).

129073837825 is an equidigital number, since it uses as much as digits as its factorization.

129073837825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785204 (or 6785199 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 129073837825 in words is "one hundred twenty-nine billion, seventy-three million, eight hundred thirty-seven thousand, eight hundred twenty-five".