8849556643 has 2 divisors, whose sum is σ = 8849556644. Its totient is φ = 8849556642.

The previous prime is 8849556629. The next prime is 8849556647. The reversal of 8849556643 is 3466559488.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8849556643 is a prime.

It is not a weakly prime, because it can be changed into another prime (8849556647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4424778321 + 4424778322.

It is an arithmetic number, because the mean of its divisors is an integer number (4424778322).

Almost surely, 2^8849556643 is an apocalyptic number.

8849556643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8849556643 is an equidigital number, since it uses as much as digits as its factorization.

8849556643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24883200, while the sum is 58.

The square root of 8849556643 is about 94072.0821657520. The cubic root of 8849556643 is about 2068.4284588350.

The spelling of 8849556643 in words is "eight billion, eight hundred forty-nine million, five hundred fifty-six thousand, six hundred forty-three".