8670643643 has 2 divisors, whose sum is σ = 8670643644. Its totient is φ = 8670643642.

The previous prime is 8670643607. The next prime is 8670643649. The reversal of 8670643643 is 3463460768.

8670643643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8670643643 - 2²² = 8666449339 is a prime.

It is a super-2 number, since 2×8670643643² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8670643649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4335321821 + 4335321822.

It is an arithmetic number, because the mean of its divisors is an integer number (4335321822).

Almost surely, 2^8670643643 is an apocalyptic number.

8670643643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8670643643 is an equidigital number, since it uses as much as digits as its factorization.

8670643643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The square root of 8670643643 is about 93116.2909645783. The cubic root of 8670643643 is about 2054.3941945774.

The spelling of 8670643643 in words is "eight billion, six hundred seventy million, six hundred forty-three thousand, six hundred forty-three".