129256595260 has 24 divisors (see below), whose sum is σ = 292318762176. Its totient is φ = 47725512000.

The previous prime is 129256595161. The next prime is 129256595263. The reversal of 129256595260 is 62595652921.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 129256595198 and 129256595207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129256595263) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 248570116 + ... + 248570635.

It is an arithmetic number, because the mean of its divisors is an integer number (12179948424).

Almost surely, 2^129256595260 is an apocalyptic number.

129256595260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129256595260 is an abundant number, since it is smaller than the sum of its proper divisors (163062166916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129256595260 is a wasteful number, since it uses less digits than its factorization.

129256595260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497140773 (or 497140771 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 129256595260 in words is "one hundred twenty-nine billion, two hundred fifty-six million, five hundred ninety-five thousand, two hundred sixty".