8200815643 has 2 divisors, whose sum is σ = 8200815644. Its totient is φ = 8200815642.

The previous prime is 8200815529. The next prime is 8200815683. The reversal of 8200815643 is 3465180028.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8200815643 - 2¹³ = 8200807451 is a prime.

It is not a weakly prime, because it can be changed into another prime (8200815683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4100407821 + 4100407822.

It is an arithmetic number, because the mean of its divisors is an integer number (4100407822).

Almost surely, 2^8200815643 is an apocalyptic number.

8200815643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8200815643 is an equidigital number, since it uses as much as digits as its factorization.

8200815643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 8200815643 is about 90558.3549044482. The cubic root of 8200815643 is about 2016.5965335019.

The spelling of 8200815643 in words is "eight billion, two hundred million, eight hundred fifteen thousand, six hundred forty-three".