12991293068 has 24 divisors (see below), whose sum is σ = 24491599440. Its totient is φ = 5994020160.

The previous prime is 12991293043. The next prime is 12991293071. The reversal of 12991293068 is 86039219921.

It is a happy 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, 126143 + ... + 204681.

It is an arithmetic number, because the mean of its divisors is an integer number (1020483310).

Almost surely, 2^12991293068 is an apocalyptic number.

It is an amenable number.

12991293068 is a deficient number, since it is larger than the sum of its proper divisors (11500306372).

12991293068 is a wasteful number, since it uses less digits than its factorization.

12991293068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81737 (or 81735 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 12991293068 in words is "twelve billion, nine hundred ninety-one million, two hundred ninety-three thousand, sixty-eight".