12128528488 has 16 divisors (see below), whose sum is σ = 23295649860. Its totient is φ = 5916355200.

The previous prime is 12128528413. The next prime is 12128528491. The reversal of 12128528488 is 88482582121.

It can be written as a sum of positive squares in 2 ways, for example, as 10452608644 + 1675919844 = 102238^2 + 40938^2 .

It is a super-2 number, since 2×12128528488² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18488283 + ... + 18488938.

Almost surely, 2^12128528488 is an apocalyptic number.

It is an amenable number.

12128528488 is a deficient number, since it is larger than the sum of its proper divisors (11167121372).

12128528488 is a wasteful number, since it uses less digits than its factorization.

12128528488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36977268 (or 36977264 counting only the distinct ones).

The product of its digits is 655360, while the sum is 49.

The spelling of 12128528488 in words is "twelve billion, one hundred twenty-eight million, five hundred twenty-eight thousand, four hundred eighty-eight".