128008231186 has 12 divisors (see below), whose sum is σ = 211054893966. Its totient is φ = 58185559520.

The previous prime is 128008231171. The next prime is 128008231193. The reversal of 128008231186 is 681132800821.

It can be written as a sum of positive squares in only one way, i.e., 116318513025 + 11689718161 = 341055^2 + 108119^2 .

It is a super-2 number, since 2×128008231186² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264479575 + ... + 264480058.

Almost surely, 2^128008231186 is an apocalyptic number.

128008231186 is a deficient number, since it is larger than the sum of its proper divisors (83046662780).

128008231186 is a wasteful number, since it uses less digits than its factorization.

128008231186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528959657 (or 528959646 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 128008231186 in words is "one hundred twenty-eight billion, eight million, two hundred thirty-one thousand, one hundred eighty-six".