129655950480 has 640 divisors, whose sum is σ = 522497986560. Its totient is φ = 28940820480.

The previous prime is 129655950469. The next prime is 129655950481. The reversal of 129655950480 is 84059556921.

129655950480 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 5 + 59 + 504 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (129655950481) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 132707752 + ... + 132708728.

It is an arithmetic number, because the mean of its divisors is an integer number (816403104).

Almost surely, 2^129655950480 is an apocalyptic number.

129655950480 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 129655950480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261248993280).

129655950480 is an abundant number, since it is smaller than the sum of its proper divisors (392842036080).

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

129655950480 is a wasteful number, since it uses less digits than its factorization.

129655950480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 129655950480 in words is "one hundred twenty-nine billion, six hundred fifty-five million, nine hundred fifty thousand, four hundred eighty".