129281325360 has 80 divisors (see below), whose sum is σ = 437205945600. Its totient is φ = 31340926720.

The previous prime is 129281325311. The next prime is 129281325379. The reversal of 129281325360 is 63523182921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×129281325360² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24482460 + ... + 24487739.

It is an arithmetic number, because the mean of its divisors is an integer number (5465074320).

Almost surely, 2^129281325360 is an apocalyptic number.

129281325360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129281325360 is an abundant number, since it is smaller than the sum of its proper divisors (307924620240).

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

129281325360 is a wasteful number, since it uses less digits than its factorization.

129281325360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48970226 (or 48970220 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 129281325360 in words is "one hundred twenty-nine billion, two hundred eighty-one million, three hundred twenty-five thousand, three hundred sixty".