6823745491 has 4 divisors (see below), whose sum is σ = 6824113192. Its totient is φ = 6823377792.

The previous prime is 6823745473. The next prime is 6823745503. The reversal of 6823745491 is 1945473286.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6823745491 - 2²⁵ = 6790191059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6823745191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154446 + ... + 193651.

It is an arithmetic number, because the mean of its divisors is an integer number (1706028298).

Almost surely, 2^6823745491 is an apocalyptic number.

6823745491 is a deficient number, since it is larger than the sum of its proper divisors (367701).

6823745491 is a wasteful number, since it uses less digits than its factorization.

6823745491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367700.

The product of its digits is 1451520, while the sum is 49.

The square root of 6823745491 is about 82605.9652264895. The cubic root of 6823745491 is about 1896.7391427970.

The spelling of 6823745491 in words is "six billion, eight hundred twenty-three million, seven hundred forty-five thousand, four hundred ninety-one".