12271578536 has 16 divisors (see below), whose sum is σ = 26296239840. Its totient is φ = 5259247920.

The previous prime is 12271578511. The next prime is 12271578541. The reversal of 12271578536 is 63587517221.

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 3 ways as a sum of consecutive naturals, for example, 109567610 + ... + 109567721.

It is an arithmetic number, because the mean of its divisors is an integer number (1643514990).

Almost surely, 2^12271578536 is an apocalyptic number.

It is an amenable number.

12271578536 is an abundant number, since it is smaller than the sum of its proper divisors (14024661304).

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

12271578536 is a wasteful number, since it uses less digits than its factorization.

12271578536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219135344 (or 219135340 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The spelling of 12271578536 in words is "twelve billion, two hundred seventy-one million, five hundred seventy-eight thousand, five hundred thirty-six".