128881022399 has 16 divisors (see below), whose sum is σ = 134994734784. Its totient is φ = 122810688000.

The previous prime is 128881022393. The next prime is 128881022401. The reversal of 128881022399 is 993220188821.

It is a cyclic number.

It is not a de Polignac number, because 128881022399 - 2⁸ = 128881022143 is a prime.

It is a super-2 number, since 2×128881022399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128881022399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128881022393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6972029 + ... + 6990489.

It is an arithmetic number, because the mean of its divisors is an integer number (8437170924).

Almost surely, 2^128881022399 is an apocalyptic number.

128881022399 is a deficient number, since it is larger than the sum of its proper divisors (6113712385).

128881022399 is a wasteful number, since it uses less digits than its factorization.

128881022399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19618.

The product of its (nonzero) digits is 995328, while the sum is 53.

The spelling of 128881022399 in words is "one hundred twenty-eight billion, eight hundred eighty-one million, twenty-two thousand, three hundred ninety-nine".