518311845 has 16 divisors (see below), whose sum is σ = 921443520. Its totient is φ = 276432912.

The previous prime is 518311841. The next prime is 518311883. The reversal of 518311845 is 548113815.

It is not a de Polignac number, because 518311845 - 2² = 518311841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518311841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1919539 + ... + 1919808.

It is an arithmetic number, because the mean of its divisors is an integer number (57590220).

Almost surely, 2^518311845 is an apocalyptic number.

It is an amenable number.

518311845 is a deficient number, since it is larger than the sum of its proper divisors (403131675).

518311845 is a wasteful number, since it uses less digits than its factorization.

518311845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839361 (or 3839355 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 518311845 is about 22766.4631640490. The cubic root of 518311845 is about 803.2740021301.

The spelling of 518311845 in words is "five hundred eighteen million, three hundred eleven thousand, eight hundred forty-five".