27874647817 has 2 divisors, whose sum is σ = 27874647818. Its totient is φ = 27874647816.

The previous prime is 27874647769. The next prime is 27874647863. The reversal of 27874647817 is 71874647872.

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., 26949818896 + 924828921 = 164164^2 + 30411^2 .

It is a cyclic number.

It is not a de Polignac number, because 27874647817 - 2²³ = 27866259209 is a prime.

It is not a weakly prime, because it can be changed into another prime (27874647517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13937323908 + 13937323909.

It is an arithmetic number, because the mean of its divisors is an integer number (13937323909).

Almost surely, 2^27874647817 is an apocalyptic number.

It is an amenable number.

27874647817 is a deficient number, since it is larger than the sum of its proper divisors (1).

27874647817 is an equidigital number, since it uses as much as digits as its factorization.

27874647817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29503488, while the sum is 61.

The spelling of 27874647817 in words is "twenty-seven billion, eight hundred seventy-four million, six hundred forty-seven thousand, eight hundred seventeen".