129788119920 has 320 divisors, whose sum is σ = 433823662080. Its totient is φ = 31995085824.

The previous prime is 129788119907. The next prime is 129788119927. The reversal of 129788119920 is 29911887921.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129788119927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94943077 + ... + 94944443.

It is an arithmetic number, because the mean of its divisors is an integer number (1355698944).

Almost surely, 2^129788119920 is an apocalyptic number.

129788119920 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 129788119920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216911831040).

129788119920 is an abundant number, since it is smaller than the sum of its proper divisors (304035542160).

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

129788119920 is a wasteful number, since it uses less digits than its factorization.

129788119920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 57.

The spelling of 129788119920 in words is "one hundred twenty-nine billion, seven hundred eighty-eight million, one hundred nineteen thousand, nine hundred twenty".