318673553365 has 4 divisors (see below), whose sum is σ = 382408264044. Its totient is φ = 254938842688.

The previous prime is 318673553321. The next prime is 318673553371. The reversal of 318673553365 is 563355376813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 563355376813 = 497929 ⋅1131397.

It can be written as a sum of positive squares in 2 ways, for example, as 210822395716 + 107851157649 = 459154^2 + 328407^2 .

It is a cyclic number.

It is not a de Polignac number, because 318673553365 - 2²³ = 318665164757 is a prime.

It is a super-2 number, since 2×318673553365² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 31867355332 + ... + 31867355341.

It is an arithmetic number, because the mean of its divisors is an integer number (95602066011).

Almost surely, 2^318673553365 is an apocalyptic number.

It is an amenable number.

318673553365 is a deficient number, since it is larger than the sum of its proper divisors (63734710679).

318673553365 is an equidigital number, since it uses as much as digits as its factorization.

318673553365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63734710678.

The product of its digits is 20412000, while the sum is 55.

The spelling of 318673553365 in words is "three hundred eighteen billion, six hundred seventy-three million, five hundred fifty-three thousand, three hundred sixty-five".