8641563829 has 2 divisors, whose sum is σ = 8641563830. Its totient is φ = 8641563828.

The previous prime is 8641563817. The next prime is 8641563859. The reversal of 8641563829 is 9283651468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8524274929 + 117288900 = 92327^2 + 10830^2 .

It is a cyclic number.

It is not a de Polignac number, because 8641563829 - 2⁷ = 8641563701 is a prime.

It is a super-2 number, since 2×8641563829² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8641563859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320781914 + 4320781915.

It is an arithmetic number, because the mean of its divisors is an integer number (4320781915).

Almost surely, 2^8641563829 is an apocalyptic number.

It is an amenable number.

8641563829 is a deficient number, since it is larger than the sum of its proper divisors (1).

8641563829 is an equidigital number, since it uses as much as digits as its factorization.

8641563829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 52.

The square root of 8641563829 is about 92960.0119890268. The cubic root of 8641563829 is about 2052.0949299312.

The spelling of 8641563829 in words is "eight billion, six hundred forty-one million, five hundred sixty-three thousand, eight hundred twenty-nine".