8208318764381 has 2 divisors, whose sum is σ = 8208318764382. Its totient is φ = 8208318764380.

The previous prime is 8208318764323. The next prime is 8208318764407. The reversal of 8208318764381 is 1834678138028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6131739775225 + 2076578989156 = 2476235^2 + 1441034^2 .

It is a cyclic number.

It is not a de Polignac number, because 8208318764381 - 2¹⁰ = 8208318763357 is a prime.

It is a super-2 number, since 2×8208318764381² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8208318764381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8208318760381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4104159382190 + 4104159382191.

It is an arithmetic number, because the mean of its divisors is an integer number (4104159382191).

Almost surely, 2^{8208318764381} is an apocalyptic number.

It is an amenable number.

8208318764381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8208318764381 is an equidigital number, since it uses as much as digits as its factorization.

8208318764381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 59.

The spelling of 8208318764381 in words is "eight trillion, two hundred eight billion, three hundred eighteen million, seven hundred sixty-four thousand, three hundred eighty-one".