8126536321 has 2 divisors, whose sum is σ = 8126536322. Its totient is φ = 8126536320.

The previous prime is 8126536309. The next prime is 8126536343. The reversal of 8126536321 is 1236356218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8090103025 + 36433296 = 89945^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 8126536321 - 2²⁹ = 7589665409 is a prime.

It is not a weakly prime, because it can be changed into another prime (8126536351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063268160 + 4063268161.

It is an arithmetic number, because the mean of its divisors is an integer number (4063268161).

Almost surely, 2^8126536321 is an apocalyptic number.

It is an amenable number.

8126536321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8126536321 is an equidigital number, since it uses as much as digits as its factorization.

8126536321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 8126536321 is about 90147.3034593936. The cubic root of 8126536321 is about 2010.4895815740.

The spelling of 8126536321 in words is "eight billion, one hundred twenty-six million, five hundred thirty-six thousand, three hundred twenty-one".