128782692480 has 512 divisors, whose sum is σ = 460500526080. Its totient is φ = 30405427200.

The previous prime is 128782692427. The next prime is 128782692487. The reversal of 128782692480 is 84296287821.

It is a self number, because there is not a number n which added to its sum of digits gives 128782692480.

It is not an unprimeable number, because it can be changed into a prime (128782692487) 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, 62423929 + ... + 62425991.

It is an arithmetic number, because the mean of its divisors is an integer number (899415090).

Almost surely, 2^128782692480 is an apocalyptic number.

128782692480 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 128782692480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230250263040).

128782692480 is an abundant number, since it is smaller than the sum of its proper divisors (331717833600).

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

128782692480 is a wasteful number, since it uses less digits than its factorization.

128782692480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 128782692480 in words is "one hundred twenty-eight billion, seven hundred eighty-two million, six hundred ninety-two thousand, four hundred eighty".