8031644813 has 2 divisors, whose sum is σ = 8031644814. Its totient is φ = 8031644812.

The previous prime is 8031644809. The next prime is 8031644903. The reversal of 8031644813 is 3184461308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5132576164 + 2899068649 = 71642^2 + 53843^2 .

It is a cyclic number.

It is not a de Polignac number, because 8031644813 - 2² = 8031644809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8031644513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4015822406 + 4015822407.

It is an arithmetic number, because the mean of its divisors is an integer number (4015822407).

Almost surely, 2^8031644813 is an apocalyptic number.

It is an amenable number.

8031644813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8031644813 is an equidigital number, since it uses as much as digits as its factorization.

8031644813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 8031644813 is about 89619.4443912704. Note that the first 3 decimals coincide. The cubic root of 8031644813 is about 2002.6335983078.

The spelling of 8031644813 in words is "eight billion, thirty-one million, six hundred forty-four thousand, eight hundred thirteen".