12647786133842 has 8 divisors (see below), whose sum is σ = 18971757414732. Its totient is φ = 6323866995600.

The previous prime is 12647786133797. The next prime is 12647786133859. The reversal of 12647786133842 is 24833168774621.

It can be written as a sum of positive squares in 2 ways, for example, as 12597026494441 + 50759639401 = 3549229^2 + 225299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12423509 + ... + 13402952.

Almost surely, 2^{12647786133842} is an apocalyptic number.

12647786133842 is a deficient number, since it is larger than the sum of its proper divisors (6323971280890).

12647786133842 is a wasteful number, since it uses less digits than its factorization.

12647786133842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26071324.

The product of its digits is 65028096, while the sum is 62.

The spelling of 12647786133842 in words is "twelve trillion, six hundred forty-seven billion, seven hundred eighty-six million, one hundred thirty-three thousand, eight hundred forty-two".