12656240012 has 24 divisors (see below), whose sum is σ = 24063236736. Its totient is φ = 5789645568.

The previous prime is 12656239987. The next prime is 12656240039. The reversal of 12656240012 is 21004265621.

It is a super-2 number, since 2×12656240012² (a number of 21 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 7 ways as a sum of consecutive naturals, for example, 1071068 + ... + 1082819.

It is an arithmetic number, because the mean of its divisors is an integer number (1002634864).

Almost surely, 2^12656240012 is an apocalyptic number.

It is an amenable number.

12656240012 is a deficient number, since it is larger than the sum of its proper divisors (11406996724).

12656240012 is a wasteful number, since it uses less digits than its factorization.

12656240012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154017 (or 2154015 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 12656240012 in words is "twelve billion, six hundred fifty-six million, two hundred forty thousand, twelve".