5181818637 has 16 divisors (see below), whose sum is σ = 7317120960. Its totient is φ = 3250620672.

The previous prime is 5181818623. The next prime is 5181818683. The reversal of 5181818637 is 7368181815.

It is not a de Polignac number, because 5181818637 - 2¹⁴ = 5181802253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181811637) 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, 314439 + ... + 330507.

It is an arithmetic number, because the mean of its divisors is an integer number (457320060).

Almost surely, 2^5181818637 is an apocalyptic number.

It is an amenable number.

5181818637 is a deficient number, since it is larger than the sum of its proper divisors (2135302323).

5181818637 is a wasteful number, since it uses less digits than its factorization.

5181818637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22412.

The product of its digits is 322560, while the sum is 48.

The square root of 5181818637 is about 71984.8500519380. The cubic root of 5181818637 is about 1730.4566980087.

The spelling of 5181818637 in words is "five billion, one hundred eighty-one million, eight hundred eighteen thousand, six hundred thirty-seven".