128475778596 has 96 divisors (see below), whose sum is σ = 344338283520. Its totient is φ = 36872611200.

The previous prime is 128475778573. The next prime is 128475778663. The reversal of 128475778596 is 695877574821.

It is a self number, because there is not a number n which added to its sum of digits gives 128475778596.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15823930 + ... + 15832046.

It is an arithmetic number, because the mean of its divisors is an integer number (3586857120).

Almost surely, 2^128475778596 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 128475778596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172169141760).

128475778596 is an abundant number, since it is smaller than the sum of its proper divisors (215862504924).

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

128475778596 is a wasteful number, since it uses less digits than its factorization.

128475778596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14465 (or 14463 counting only the distinct ones).

The product of its digits is 237081600, while the sum is 69.

The spelling of 128475778596 in words is "one hundred twenty-eight billion, four hundred seventy-five million, seven hundred seventy-eight thousand, five hundred ninety-six".