5218459685 has 4 divisors (see below), whose sum is σ = 6262151628. Its totient is φ = 4174767744.

The previous prime is 5218459681. The next prime is 5218459691. The reversal of 5218459685 is 5869548125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3233400769 + 1985058916 = 56863^2 + 44554^2 .

It is a cyclic number.

It is not a de Polignac number, because 5218459685 - 2² = 5218459681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218459681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521845964 + ... + 521845973.

It is an arithmetic number, because the mean of its divisors is an integer number (1565537907).

Almost surely, 2^5218459685 is an apocalyptic number.

It is an amenable number.

5218459685 is a deficient number, since it is larger than the sum of its proper divisors (1043691943).

5218459685 is a wasteful number, since it uses less digits than its factorization.

5218459685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043691942.

The product of its digits is 3456000, while the sum is 53.

The square root of 5218459685 is about 72238.9070030825. The cubic root of 5218459685 is about 1734.5258538201.

The spelling of 5218459685 in words is "five billion, two hundred eighteen million, four hundred fifty-nine thousand, six hundred eighty-five".