12947778551699 has 2 divisors, whose sum is σ = 12947778551700. Its totient is φ = 12947778551698.

The previous prime is 12947778551557. The next prime is 12947778551777. The reversal of 12947778551699 is 99615587774921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12947778551699 - 2³² = 12943483584403 is a prime.

It is not a weakly prime, because it can be changed into another prime (12947078551699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473889275849 + 6473889275850.

It is an arithmetic number, because the mean of its divisors is an integer number (6473889275850).

Almost surely, 2^{12947778551699} is an apocalyptic number.

12947778551699 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947778551699 is an equidigital number, since it uses as much as digits as its factorization.

12947778551699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400451200, while the sum is 80.

The spelling of 12947778551699 in words is "twelve trillion, nine hundred forty-seven billion, seven hundred seventy-eight million, five hundred fifty-one thousand, six hundred ninety-nine".