1318312845 has 12 divisors (see below), whose sum is σ = 2285075676. Its totient is φ = 703100160.

The previous prime is 1318312841. The next prime is 1318312859. The reversal of 1318312845 is 5482138131.

It can be written as a sum of positive squares in 2 ways, for example, as 426752964 + 891559881 = 20658^2 + 29859^2 .

It is not a de Polignac number, because 1318312845 - 2² = 1318312841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318312841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14647876 + ... + 14647965.

It is an arithmetic number, because the mean of its divisors is an integer number (190422973).

Almost surely, 2^1318312845 is an apocalyptic number.

1318312845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1318312845 is a deficient number, since it is larger than the sum of its proper divisors (966762831).

1318312845 is a wasteful number, since it uses less digits than its factorization.

1318312845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29295852 (or 29295849 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1318312845 is about 36308.5781186760. The cubic root of 1318312845 is about 1096.4937516915.

The spelling of 1318312845 in words is "one billion, three hundred eighteen million, three hundred twelve thousand, eight hundred forty-five".