8556798735449 has 2 divisors, whose sum is σ = 8556798735450. Its totient is φ = 8556798735448.

The previous prime is 8556798735347. The next prime is 8556798735473. The reversal of 8556798735449 is 9445378976558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4372728485449 + 4184070250000 = 2091107^2 + 2045500^2 .

It is a cyclic number.

It is not a de Polignac number, because 8556798735449 - 2⁸ = 8556798735193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8556798737449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278399367724 + 4278399367725.

It is an arithmetic number, because the mean of its divisors is an integer number (4278399367725).

Almost surely, 2^{8556798735449} is an apocalyptic number.

It is an amenable number.

8556798735449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556798735449 is an equidigital number, since it uses as much as digits as its factorization.

8556798735449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576000, while the sum is 80.

The spelling of 8556798735449 in words is "eight trillion, five hundred fifty-six billion, seven hundred ninety-eight million, seven hundred thirty-five thousand, four hundred forty-nine".