128893026449 has 32 divisors (see below), whose sum is σ = 144605260800. Its totient is φ = 113875796160.

The previous prime is 128893026377. The next prime is 128893026499. The reversal of 128893026449 is 944620398821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128893026449 - 2¹⁶ = 128892960913 is a prime.

It is a super-2 number, since 2×128893026449² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128893026394 and 128893026403.

It is not an unprimeable number, because it can be changed into a prime (128893026499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121253492 + ... + 121254554.

It is an arithmetic number, because the mean of its divisors is an integer number (4518914400).

Almost surely, 2^128893026449 is an apocalyptic number.

It is an amenable number.

128893026449 is a deficient number, since it is larger than the sum of its proper divisors (15712234351).

128893026449 is a wasteful number, since it uses less digits than its factorization.

128893026449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 128893026449 in words is "one hundred twenty-eight billion, eight hundred ninety-three million, twenty-six thousand, four hundred forty-nine".