8136816869 has 2 divisors, whose sum is σ = 8136816870. Its totient is φ = 8136816868.

The previous prime is 8136816851. The next prime is 8136816887. The reversal of 8136816869 is 9686186318.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (8136816851) and next prime (8136816887).

It can be written as a sum of positive squares in only one way, i.e., 7781004100 + 355812769 = 88210^2 + 18863^2 .

It is a cyclic number.

It is not a de Polignac number, because 8136816869 - 2⁸ = 8136816613 is a prime.

It is a super-2 number, since 2×8136816869² (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 (8136816829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068408434 + 4068408435.

It is an arithmetic number, because the mean of its divisors is an integer number (4068408435).

Almost surely, 2^8136816869 is an apocalyptic number.

It is an amenable number.

8136816869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8136816869 is an equidigital number, since it uses as much as digits as its factorization.

8136816869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The square root of 8136816869 is about 90204.3062663862. The cubic root of 8136816869 is about 2011.3370203082.

The spelling of 8136816869 in words is "eight billion, one hundred thirty-six million, eight hundred sixteen thousand, eight hundred sixty-nine".