318138613201 has 2 divisors, whose sum is σ = 318138613202. Its totient is φ = 318138613200.

The previous prime is 318138613181. The next prime is 318138613229. The reversal of 318138613201 is 102316831813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274801366225 + 43337246976 = 524215^2 + 208176^2 .

It is a cyclic number.

It is not a de Polignac number, because 318138613201 - 2¹³ = 318138605009 is a prime.

It is not a weakly prime, because it can be changed into another prime (318138613231) 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, 159069306600 + 159069306601.

It is an arithmetic number, because the mean of its divisors is an integer number (159069306601).

Almost surely, 2^318138613201 is an apocalyptic number.

It is an amenable number.

318138613201 is a deficient number, since it is larger than the sum of its proper divisors (1).

318138613201 is an equidigital number, since it uses as much as digits as its factorization.

318138613201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 318138613201 in words is "three hundred eighteen billion, one hundred thirty-eight million, six hundred thirteen thousand, two hundred one".