2318286398405 has 4 divisors (see below), whose sum is σ = 2781943678092. Its totient is φ = 1854629118720.

The previous prime is 2318286398401. The next prime is 2318286398429. The reversal of 2318286398405 is 5048936828132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1266689473729 + 1051596924676 = 1125473^2 + 1025474^2 .

It is not a de Polignac number, because 2318286398405 - 2² = 2318286398401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2318286398401) 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, 231828639836 + ... + 231828639845.

It is an arithmetic number, because the mean of its divisors is an integer number (695485919523).

Almost surely, 2^{2318286398405} is an apocalyptic number.

It is an amenable number.

2318286398405 is a deficient number, since it is larger than the sum of its proper divisors (463657279687).

2318286398405 is an equidigital number, since it uses as much as digits as its factorization.

2318286398405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463657279686.

The product of its (nonzero) digits is 19906560, while the sum is 59.

Adding to 2318286398405 its sum of digits (59), we get a square (2318286398464 = 1522592²).

The spelling of 2318286398405 in words is "two trillion, three hundred eighteen billion, two hundred eighty-six million, three hundred ninety-eight thousand, four hundred five".