12147228956 has 24 divisors (see below), whose sum is σ = 21996198000. Its totient is φ = 5862706304.

The previous prime is 12147228923. The next prime is 12147228997. The reversal of 12147228956 is 65982274121.

It is a self number, because there is not a number n which added to its sum of digits gives 12147228956.

It is a congruent number.

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, 556415 + ... + 577833.

It is an arithmetic number, because the mean of its divisors is an integer number (916508250).

Almost surely, 2^12147228956 is an apocalyptic number.

It is an amenable number.

12147228956 is a deficient number, since it is larger than the sum of its proper divisors (9848969044).

12147228956 is a wasteful number, since it uses less digits than its factorization.

12147228956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26341 (or 26339 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The spelling of 12147228956 in words is "twelve billion, one hundred forty-seven million, two hundred twenty-eight thousand, nine hundred fifty-six".