8478786577 has 2 divisors, whose sum is σ = 8478786578. Its totient is φ = 8478786576.

The previous prime is 8478786529. The next prime is 8478786581. The reversal of 8478786577 is 7756878748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4488464016 + 3990322561 = 66996^2 + 63169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8478786577 is a prime.

It is not a weakly prime, because it can be changed into another prime (8478786527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239393288 + 4239393289.

It is an arithmetic number, because the mean of its divisors is an integer number (4239393289).

Almost surely, 2^8478786577 is an apocalyptic number.

It is an amenable number.

8478786577 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478786577 is an equidigital number, since it uses as much as digits as its factorization.

8478786577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147517440, while the sum is 67.

The square root of 8478786577 is about 92080.3267641900. The cubic root of 8478786577 is about 2039.1283743518.

The spelling of 8478786577 in words is "eight billion, four hundred seventy-eight million, seven hundred eighty-six thousand, five hundred seventy-seven".