6817844358 has 80 divisors (see below), whose sum is σ = 16553944176. Its totient is φ = 2084823360.

The previous prime is 6817844351. The next prime is 6817844381. The reversal of 6817844358 is 8534487186.

6817844358 is a `hidden beast` number, since 6 + 81 + 78 + 443 + 58 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6817844351) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 333348 + ... + 353208.

Almost surely, 2^6817844358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6817844358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8276972088).

6817844358 is an abundant number, since it is smaller than the sum of its proper divisors (9736099818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6817844358 is a wasteful number, since it uses less digits than its factorization.

6817844358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20051 (or 20042 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 6817844358 is about 82570.2389363141. The cubic root of 6817844358 is about 1896.1922223395.

The spelling of 6817844358 in words is "six billion, eight hundred seventeen million, eight hundred forty-four thousand, three hundred fifty-eight".