8820535643 has 2 divisors, whose sum is σ = 8820535644. Its totient is φ = 8820535642.

The previous prime is 8820535639. The next prime is 8820535723. The reversal of 8820535643 is 3465350288.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8820535643 - 2² = 8820535639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8820535594 and 8820535603.

It is not a weakly prime, because it can be changed into another prime (8820537643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4410267821 + 4410267822.

It is an arithmetic number, because the mean of its divisors is an integer number (4410267822).

Almost surely, 2^8820535643 is an apocalyptic number.

8820535643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8820535643 is an equidigital number, since it uses as much as digits as its factorization.

8820535643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 44.

The square root of 8820535643 is about 93917.7067596947. The cubic root of 8820535643 is about 2066.1649330087.

The spelling of 8820535643 in words is "eight billion, eight hundred twenty million, five hundred thirty-five thousand, six hundred forty-three".