128881283968 has 64 divisors (see below), whose sum is σ = 272661483600. Its totient is φ = 60508643328.

The previous prime is 128881283959. The next prime is 128881284019. The reversal of 128881283968 is 869382188821.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×128881283968² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40330 + ... + 509302.

Almost surely, 2^128881283968 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 128881283968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136330741800).

128881283968 is an abundant number, since it is smaller than the sum of its proper divisors (143780199632).

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

128881283968 is a wasteful number, since it uses less digits than its factorization.

128881283968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469119 (or 469107 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 64.

The spelling of 128881283968 in words is "one hundred twenty-eight billion, eight hundred eighty-one million, two hundred eighty-three thousand, nine hundred sixty-eight".