316844477381 has 2 divisors, whose sum is σ = 316844477382. Its totient is φ = 316844477380.

The previous prime is 316844477377. The next prime is 316844477399. The reversal of 316844477381 is 183774448613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281271122500 + 35573354881 = 530350^2 + 188609^2 .

It is a cyclic number.

It is not a de Polignac number, because 316844477381 - 2² = 316844477377 is a prime.

It is a super-2 number, since 2×316844477381² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316844477351) 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, 158422238690 + 158422238691.

It is an arithmetic number, because the mean of its divisors is an integer number (158422238691).

Almost surely, 2^316844477381 is an apocalyptic number.

It is an amenable number.

316844477381 is a deficient number, since it is larger than the sum of its proper divisors (1).

316844477381 is an equidigital number, since it uses as much as digits as its factorization.

316844477381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 56.

The spelling of 316844477381 in words is "three hundred sixteen billion, eight hundred forty-four million, four hundred seventy-seven thousand, three hundred eighty-one".