12129491264 has 56 divisors (see below), whose sum is σ = 26271979968. Its totient is φ = 5510384640.

The previous prime is 12129491249. The next prime is 12129491317. The reversal of 12129491264 is 46219492121.

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, 1737509 + ... + 1744475.

Almost surely, 2^12129491264 is an apocalyptic number.

It is an amenable number.

12129491264 is an abundant number, since it is smaller than the sum of its proper divisors (14142488704).

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

12129491264 is a wasteful number, since it uses less digits than its factorization.

12129491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9463 (or 9453 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The spelling of 12129491264 in words is "twelve billion, one hundred twenty-nine million, four hundred ninety-one thousand, two hundred sixty-four".