129927949440 has 256 divisors, whose sum is σ = 435573227520. Its totient is φ = 32878669824.

The previous prime is 129927949399. The next prime is 129927949453. The reversal of 129927949440 is 44949729921.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5596737 + ... + 5619903.

It is an arithmetic number, because the mean of its divisors is an integer number (1701457920).

Almost surely, 2^129927949440 is an apocalyptic number.

129927949440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129927949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217786613760).

129927949440 is an abundant number, since it is smaller than the sum of its proper divisors (305645278080).

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

129927949440 is a wasteful number, since it uses less digits than its factorization.

129927949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23339 (or 23327 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 129927949440 in words is "one hundred twenty-nine billion, nine hundred twenty-seven million, nine hundred forty-nine thousand, four hundred forty".