318810451481 has 2 divisors, whose sum is σ = 318810451482. Its totient is φ = 318810451480.

The previous prime is 318810451469. The next prime is 318810451513. The reversal of 318810451481 is 184154018813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246900665881 + 71909785600 = 496891^2 + 268160^2 .

It is an emirp because it is prime and its reverse (184154018813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318810451481 - 2¹⁸ = 318810189337 is a prime.

It is a super-2 number, since 2×318810451481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (318810451451) 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, 159405225740 + 159405225741.

It is an arithmetic number, because the mean of its divisors is an integer number (159405225741).

Almost surely, 2^318810451481 is an apocalyptic number.

It is an amenable number.

318810451481 is a deficient number, since it is larger than the sum of its proper divisors (1).

318810451481 is an equidigital number, since it uses as much as digits as its factorization.

318810451481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122880, while the sum is 44.

The spelling of 318810451481 in words is "three hundred eighteen billion, eight hundred ten million, four hundred fifty-one thousand, four hundred eighty-one".