6858278789 has 4 divisors (see below), whose sum is σ = 6859600620. Its totient is φ = 6856956960.

The previous prime is 6858278761. The next prime is 6858278803. The reversal of 6858278789 is 9878728586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9878728586 = 2 ⋅4939364293.

It can be written as a sum of positive squares in 2 ways, for example, as 6214641889 + 643636900 = 78833^2 + 25370^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858278789 - 2¹² = 6858274693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6858278719) 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, 653102 + ... + 663519.

It is an arithmetic number, because the mean of its divisors is an integer number (1714900155).

Almost surely, 2^6858278789 is an apocalyptic number.

It is an amenable number.

6858278789 is a deficient number, since it is larger than the sum of its proper divisors (1321831).

6858278789 is a wasteful number, since it uses less digits than its factorization.

6858278789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321830.

The product of its digits is 108380160, while the sum is 68.

The square root of 6858278789 is about 82814.7256772610. The cubic root of 6858278789 is about 1899.9334038523.

The spelling of 6858278789 in words is "six billion, eight hundred fifty-eight million, two hundred seventy-eight thousand, seven hundred eighty-nine".