5185218685 has 16 divisors (see below), whose sum is σ = 6335152560. Its totient is φ = 4073149440.

The previous prime is 5185218673. The next prime is 5185218697. The reversal of 5185218685 is 5868125815.

It is an interprime number because it is at equal distance from previous prime (5185218673) and next prime (5185218697).

It can be written as a sum of positive squares in 8 ways, for example, as 113784889 + 5071433796 = 10667^2 + 71214^2 .

It is not a de Polignac number, because 5185218685 - 2⁵ = 5185218653 is a prime.

It is a super-2 number, since 2×5185218685² = 53772985622546258450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166531 + ... + 195199.

It is an arithmetic number, because the mean of its divisors is an integer number (395947035).

Almost surely, 2^5185218685 is an apocalyptic number.

It is an amenable number.

5185218685 is a deficient number, since it is larger than the sum of its proper divisors (1149933875).

5185218685 is a wasteful number, since it uses less digits than its factorization.

5185218685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29328.

The product of its digits is 768000, while the sum is 49.

The square root of 5185218685 is about 72008.4625929481. The cubic root of 5185218685 is about 1730.8350947240.

The spelling of 5185218685 in words is "five billion, one hundred eighty-five million, two hundred eighteen thousand, six hundred eighty-five".