12381717746 has 12 divisors (see below), whose sum is σ = 19729347018. Its totient is φ = 5826690432.

The previous prime is 12381717739. The next prime is 12381717767. The reversal of 12381717746 is 64771718321.

It can be written as a sum of positive squares in 3 ways, for example, as 11864655625 + 517062121 = 108925^2 + 22739^2 .

It is a super-2 number, since 2×12381717746² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12381717746.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10710251 + ... + 10711406.

Almost surely, 2^12381717746 is an apocalyptic number.

12381717746 is a deficient number, since it is larger than the sum of its proper divisors (7347629272).

12381717746 is a wasteful number, since it uses less digits than its factorization.

12381717746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421693 (or 21421676 counting only the distinct ones).

The product of its digits is 395136, while the sum is 47.

The spelling of 12381717746 in words is "twelve billion, three hundred eighty-one million, seven hundred seventeen thousand, seven hundred forty-six".