128019757888 has 84 divisors (see below), whose sum is σ = 279943258756. Its totient is φ = 58042828800.

The previous prime is 128019757883. The next prime is 128019757897. The reversal of 128019757888 is 888757910821.

It can be written as a sum of positive squares in 2 ways, for example, as 114547048704 + 13472709184 = 338448^2 + 116072^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128019757883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3053548 + ... + 3095188.

Almost surely, 2^128019757888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128019757888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139971629378).

128019757888 is an abundant number, since it is smaller than the sum of its proper divisors (151923500868).

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

128019757888 is a wasteful number, since it uses less digits than its factorization.

128019757888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42072 (or 42051 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 64.

The spelling of 128019757888 in words is "one hundred twenty-eight billion, nineteen million, seven hundred fifty-seven thousand, eight hundred eighty-eight".