918312656381 has 2 divisors, whose sum is σ = 918312656382. Its totient is φ = 918312656380.

The previous prime is 918312656323. The next prime is 918312656383. The reversal of 918312656381 is 183656213819.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580554087481 + 337758568900 = 761941^2 + 581170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-918312656381 is a prime.

It is a super-2 number, since 2×918312656381² (a number of 25 digits) contains 22 as substring.

Together with 918312656383, 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 (918312656383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459156328190 + 459156328191.

It is an arithmetic number, because the mean of its divisors is an integer number (459156328191).

Almost surely, 2^918312656381 is an apocalyptic number.

It is an amenable number.

918312656381 is a deficient number, since it is larger than the sum of its proper divisors (1).

918312656381 is an equidigital number, since it uses as much as digits as its factorization.

918312656381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The spelling of 918312656381 in words is "nine hundred eighteen billion, three hundred twelve million, six hundred fifty-six thousand, three hundred eighty-one".