12894766517 has 2 divisors, whose sum is σ = 12894766518. Its totient is φ = 12894766516.

The previous prime is 12894766477. The next prime is 12894766519. The reversal of 12894766517 is 71566749821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12787312561 + 107453956 = 113081^2 + 10366^2 .

It is a cyclic number.

It is not a de Polignac number, because 12894766517 - 2⁶ = 12894766453 is a prime.

It is a super-2 number, since 2×12894766517² (a number of 21 digits) contains 22 as substring.

Together with 12894766519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12894766519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6447383258 + 6447383259.

It is an arithmetic number, because the mean of its divisors is an integer number (6447383259).

Almost surely, 2^12894766517 is an apocalyptic number.

It is an amenable number.

12894766517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12894766517 is an equidigital number, since it uses as much as digits as its factorization.

12894766517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The spelling of 12894766517 in words is "twelve billion, eight hundred ninety-four million, seven hundred sixty-six thousand, five hundred seventeen".