8220475643 has 2 divisors, whose sum is σ = 8220475644. Its totient is φ = 8220475642.

The previous prime is 8220475607. The next prime is 8220475661. The reversal of 8220475643 is 3465740228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8220475643 - 2¹² = 8220471547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8220475643.

It is not a weakly prime, because it can be changed into another prime (8220475843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110237821 + 4110237822.

It is an arithmetic number, because the mean of its divisors is an integer number (4110237822).

Almost surely, 2^8220475643 is an apocalyptic number.

8220475643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220475643 is an equidigital number, since it uses as much as digits as its factorization.

8220475643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 41.

The square root of 8220475643 is about 90666.8387173613. The cubic root of 8220475643 is about 2018.2067248965.

The spelling of 8220475643 in words is "eight billion, two hundred twenty million, four hundred seventy-five thousand, six hundred forty-three".