8189538463 has 2 divisors, whose sum is σ = 8189538464. Its totient is φ = 8189538462.

The previous prime is 8189538443. The next prime is 8189538509. The reversal of 8189538463 is 3648359818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8189538463 - 2²⁹ = 7652667551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8189538443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094769231 + 4094769232.

It is an arithmetic number, because the mean of its divisors is an integer number (4094769232).

Almost surely, 2^8189538463 is an apocalyptic number.

8189538463 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189538463 is an equidigital number, since it uses as much as digits as its factorization.

8189538463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The square root of 8189538463 is about 90496.0687709693. The cubic root of 8189538463 is about 2015.6717493003.

The spelling of 8189538463 in words is "eight billion, one hundred eighty-nine million, five hundred thirty-eight thousand, four hundred sixty-three".