128377441920 has 512 divisors, whose sum is σ = 515947138560. Its totient is φ = 26424115200.

The previous prime is 128377441897. The next prime is 128377441937. The reversal of 128377441920 is 29144773821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 128377441920.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7154560 + ... + 7172480.

It is an arithmetic number, because the mean of its divisors is an integer number (1007709255).

Almost surely, 2^128377441920 is an apocalyptic number.

128377441920 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 128377441920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257973569280).

128377441920 is an abundant number, since it is smaller than the sum of its proper divisors (387569696640).

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

128377441920 is a wasteful number, since it uses less digits than its factorization.

128377441920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18004 (or 17992 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 128377441920 in words is "one hundred twenty-eight billion, three hundred seventy-seven million, four hundred forty-one thousand, nine hundred twenty".