27776256947 has 2 divisors, whose sum is σ = 27776256948. Its totient is φ = 27776256946.

The previous prime is 27776256943. The next prime is 27776256953. The reversal of 27776256947 is 74965267772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27776256947 - 2² = 27776256943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27776256947.

It is not a weakly prime, because it can be changed into another prime (27776256941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888128473 + 13888128474.

It is an arithmetic number, because the mean of its divisors is an integer number (13888128474).

Almost surely, 2^27776256947 is an apocalyptic number.

27776256947 is a deficient number, since it is larger than the sum of its proper divisors (1).

27776256947 is an equidigital number, since it uses as much as digits as its factorization.

27776256947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62233920, while the sum is 62.

The spelling of 27776256947 in words is "twenty-seven billion, seven hundred seventy-six million, two hundred fifty-six thousand, nine hundred forty-seven".