128226819873 has 16 divisors (see below), whose sum is σ = 173555056640. Its totient is φ = 84201250896.

The previous prime is 128226819869. The next prime is 128226819883. The reversal of 128226819873 is 378918622821.

It is not a de Polignac number, because 128226819873 - 2² = 128226819869 is a prime.

It is a super-2 number, since 2×128226819873² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128226819883) 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, 1157665 + ... + 1263582.

It is an arithmetic number, because the mean of its divisors is an integer number (10847191040).

Almost surely, 2^128226819873 is an apocalyptic number.

It is an amenable number.

128226819873 is a deficient number, since it is larger than the sum of its proper divisors (45328236767).

128226819873 is a wasteful number, since it uses less digits than its factorization.

128226819873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421516.

The product of its digits is 4644864, while the sum is 57.

The spelling of 128226819873 in words is "one hundred twenty-eight billion, two hundred twenty-six million, eight hundred nineteen thousand, eight hundred seventy-three".