128796665382 has 128 divisors (see below), whose sum is σ = 359113927680. Its totient is φ = 33240430080.

The previous prime is 128796665369. The next prime is 128796665471. The reversal of 128796665382 is 283566697821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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, 554158 + ... + 751454.

It is an arithmetic number, because the mean of its divisors is an integer number (2805577560).

Almost surely, 2^128796665382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128796665382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179556963840).

128796665382 is an abundant number, since it is smaller than the sum of its proper divisors (230317262298).

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

128796665382 is a wasteful number, since it uses less digits than its factorization.

128796665382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197483 (or 197477 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

It can be divided in two parts, 1287 and 96665382, that added together give a palindrome (96666669).

The spelling of 128796665382 in words is "one hundred twenty-eight billion, seven hundred ninety-six million, six hundred sixty-five thousand, three hundred eighty-two".