12128853280 has 48 divisors (see below), whose sum is σ = 29642510520. Its totient is φ = 4684244992.

The previous prime is 12128853263. The next prime is 12128853293. The reversal of 12128853280 is 8235882121.

It can be written as a sum of positive squares in 4 ways, for example, as 8171436816 + 3957416464 = 90396^2 + 62908^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 1302349 + ... + 1311628.

Almost surely, 2^12128853280 is an apocalyptic number.

12128853280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12128853280 is an abundant number, since it is smaller than the sum of its proper divisors (17513657240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12128853280 is a wasteful number, since it uses less digits than its factorization.

12128853280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614021 (or 2614013 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 12128853280 in words is "twelve billion, one hundred twenty-eight million, eight hundred fifty-three thousand, two hundred eighty".