12680478691 has 2 divisors, whose sum is σ = 12680478692. Its totient is φ = 12680478690.

The previous prime is 12680478689. The next prime is 12680478739. The reversal of 12680478691 is 19687408621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12680478691 - 2¹ = 12680478689 is a prime.

Together with 12680478689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12680478631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6340239345 + 6340239346.

It is an arithmetic number, because the mean of its divisors is an integer number (6340239346).

Almost surely, 2^12680478691 is an apocalyptic number.

12680478691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12680478691 is an equidigital number, since it uses as much as digits as its factorization.

12680478691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 12680478691 in words is "twelve billion, six hundred eighty million, four hundred seventy-eight thousand, six hundred ninety-one".