318743481881 has 4 divisors (see below), whose sum is σ = 347720162064. Its totient is φ = 289766801700.

The previous prime is 318743481853. The next prime is 318743481907. The reversal of 318743481881 is 188184347813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318743481881 is a prime.

It is a super-2 number, since 2×318743481881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (318743483881) 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, 14488340075 + ... + 14488340096.

It is an arithmetic number, because the mean of its divisors is an integer number (86930040516).

Almost surely, 2^318743481881 is an apocalyptic number.

It is an amenable number.

318743481881 is a deficient number, since it is larger than the sum of its proper divisors (28976680183).

318743481881 is a wasteful number, since it uses less digits than its factorization.

318743481881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28976680182.

The product of its digits is 4128768, while the sum is 56.

The spelling of 318743481881 in words is "three hundred eighteen billion, seven hundred forty-three million, four hundred eighty-one thousand, eight hundred eighty-one".