318877161217 has 4 divisors (see below), whose sum is σ = 326654652996. Its totient is φ = 311099669440.

The previous prime is 318877161181. The next prime is 318877161263. The reversal of 318877161217 is 712161778813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712161778813 = 107 ⋅6655717559.

It can be written as a sum of positive squares in 2 ways, for example, as 105978895936 + 212898265281 = 325544^2 + 461409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318877161217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318877161817) 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 in 3 ways as a sum of consecutive naturals, for example, 3888745828 + ... + 3888745909.

It is an arithmetic number, because the mean of its divisors is an integer number (81663663249).

Almost surely, 2^318877161217 is an apocalyptic number.

It is an amenable number.

318877161217 is a deficient number, since it is larger than the sum of its proper divisors (7777491779).

318877161217 is an equidigital number, since it uses as much as digits as its factorization.

318877161217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777491778.

The product of its digits is 790272, while the sum is 52.

The spelling of 318877161217 in words is "three hundred eighteen billion, eight hundred seventy-seven million, one hundred sixty-one thousand, two hundred seventeen".