8538286643 has 2 divisors, whose sum is σ = 8538286644. Its totient is φ = 8538286642.

The previous prime is 8538286639. The next prime is 8538286649. The reversal of 8538286643 is 3466828358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8538286643 - 2² = 8538286639 is a prime.

It is not a weakly prime, because it can be changed into another prime (8538286649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4269143321 + 4269143322.

It is an arithmetic number, because the mean of its divisors is an integer number (4269143322).

Almost surely, 2^8538286643 is an apocalyptic number.

8538286643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8538286643 is an equidigital number, since it uses as much as digits as its factorization.

8538286643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 53.

The square root of 8538286643 is about 92402.8497558382. The cubic root of 8538286643 is about 2043.8871357284.

The spelling of 8538286643 in words is "eight billion, five hundred thirty-eight million, two hundred eighty-six thousand, six hundred forty-three".