2318681845505 has 4 divisors (see below), whose sum is σ = 2782418214612. Its totient is φ = 1854945476400.

The previous prime is 2318681845399. The next prime is 2318681845541. The reversal of 2318681845505 is 5055481868132.

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 1711826823424 + 606855022081 = 1308368^2 + 779009^2 .

It is not a de Polignac number, because 2318681845505 - 2²² = 2318677651201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231868184546 + ... + 231868184555.

It is an arithmetic number, because the mean of its divisors is an integer number (695604553653).

Almost surely, 2^{2318681845505} is an apocalyptic number.

It is an amenable number.

2318681845505 is a deficient number, since it is larger than the sum of its proper divisors (463736369107).

2318681845505 is an equidigital number, since it uses as much as digits as its factorization.

2318681845505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463736369106.

The product of its (nonzero) digits is 9216000, while the sum is 56.

The spelling of 2318681845505 in words is "two trillion, three hundred eighteen billion, six hundred eighty-one million, eight hundred forty-five thousand, five hundred five".