818788345313 has 2 divisors, whose sum is σ = 818788345314. Its totient is φ = 818788345312.

The previous prime is 818788345307. The next prime is 818788345373. The reversal of 818788345313 is 313543887818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747588495424 + 71199849889 = 864632^2 + 266833^2 .

It is a cyclic number.

It is not a de Polignac number, because 818788345313 - 2¹⁰ = 818788344289 is a prime.

It is not a weakly prime, because it can be changed into another prime (818788345373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409394172656 + 409394172657.

It is an arithmetic number, because the mean of its divisors is an integer number (409394172657).

Almost surely, 2^818788345313 is an apocalyptic number.

It is an amenable number.

818788345313 is a deficient number, since it is larger than the sum of its proper divisors (1).

818788345313 is an equidigital number, since it uses as much as digits as its factorization.

818788345313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 59.

The spelling of 818788345313 in words is "eight hundred eighteen billion, seven hundred eighty-eight million, three hundred forty-five thousand, three hundred thirteen".