128823699826 has 16 divisors (see below), whose sum is σ = 194205421440. Its totient is φ = 64089189360.

The previous prime is 128823699811. The next prime is 128823699833. The reversal of 128823699826 is 628996328821.

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, 253305 + ... + 567283.

It is an arithmetic number, because the mean of its divisors is an integer number (12137838840).

Almost surely, 2^128823699826 is an apocalyptic number.

128823699826 is a deficient number, since it is larger than the sum of its proper divisors (65381721614).

128823699826 is a wasteful number, since it uses less digits than its factorization.

128823699826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315009.

The product of its digits is 35831808, while the sum is 64.

The spelling of 128823699826 in words is "one hundred twenty-eight billion, eight hundred twenty-three million, six hundred ninety-nine thousand, eight hundred twenty-six".