318822137789 has 2 divisors, whose sum is σ = 318822137790. Its totient is φ = 318822137788.

The previous prime is 318822137713. The next prime is 318822137791. The reversal of 318822137789 is 987731228813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172156116889 + 146666020900 = 414917^2 + 382970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318822137789 is a prime.

Together with 318822137791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318822133789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159411068894 + 159411068895.

It is an arithmetic number, because the mean of its divisors is an integer number (159411068895).

Almost surely, 2^318822137789 is an apocalyptic number.

It is an amenable number.

318822137789 is a deficient number, since it is larger than the sum of its proper divisors (1).

318822137789 is an equidigital number, since it uses as much as digits as its factorization.

318822137789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 59.

The spelling of 318822137789 in words is "three hundred eighteen billion, eight hundred twenty-two million, one hundred thirty-seven thousand, seven hundred eighty-nine".