6497788821839 has 8 divisors (see below), whose sum is σ = 7426494754080. Its totient is φ = 5569195486176.

The previous prime is 6497788821829. The next prime is 6497788821857. The reversal of 6497788821839 is 9381288877946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6497788821839 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 (6497788821829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28025444 + ... + 28256345.

It is an arithmetic number, because the mean of its divisors is an integer number (928311844260).

Almost surely, 2^{6497788821839} is an apocalyptic number.

6497788821839 is a deficient number, since it is larger than the sum of its proper divisors (928705932241).

6497788821839 is a wasteful number, since it uses less digits than its factorization.

6497788821839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56298289.

The product of its digits is 2341011456, while the sum is 80.

The spelling of 6497788821839 in words is "six trillion, four hundred ninety-seven billion, seven hundred eighty-eight million, eight hundred twenty-one thousand, eight hundred thirty-nine".