6479218693 has 4 divisors (see below), whose sum is σ = 6546014860. Its totient is φ = 6412422528.

The previous prime is 6479218667. The next prime is 6479218727. The reversal of 6479218693 is 3968129746.

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 898680484 + 5580538209 = 29978^2 + 74703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6479218693 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 (6479215693) 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, 33397938 + ... + 33398131.

It is an arithmetic number, because the mean of its divisors is an integer number (1636503715).

Almost surely, 2^6479218693 is an apocalyptic number.

It is an amenable number.

6479218693 is a deficient number, since it is larger than the sum of its proper divisors (66796167).

6479218693 is an equidigital number, since it uses as much as digits as its factorization.

6479218693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66796166.

The product of its digits is 3919104, while the sum is 55.

The square root of 6479218693 is about 80493.5941115813. The cubic root of 6479218693 is about 1864.2645714709.

The spelling of 6479218693 in words is "six billion, four hundred seventy-nine million, two hundred eighteen thousand, six hundred ninety-three".