12456717522394 has 8 divisors (see below), whose sum is σ = 18766670503860. Its totient is φ = 6201160687776.

The previous prime is 12456717522377. The next prime is 12456717522419. The reversal of 12456717522394 is 49322571765421.

It is a happy number.

12456717522394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10151953281369 + 2304764241025 = 3186213^2 + 1518145^2 .

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

It is a super-2 number, since 2×12456717522394² (a number of 27 digits) contains 22 as substring.

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, 13599036139 + ... + 13599037054.

Almost surely, 2^{12456717522394} is an apocalyptic number.

12456717522394 is a deficient number, since it is larger than the sum of its proper divisors (6309952981466).

12456717522394 is a wasteful number, since it uses less digits than its factorization.

12456717522394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27198073424.

The product of its digits is 25401600, while the sum is 58.

The spelling of 12456717522394 in words is "twelve trillion, four hundred fifty-six billion, seven hundred seventeen million, five hundred twenty-two thousand, three hundred ninety-four".