6597838649 has 4 divisors (see below), whose sum is σ = 6598325136. Its totient is φ = 6597352164.

The previous prime is 6597838619. The next prime is 6597838651. The reversal of 6597838649 is 9468387956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6597838649 - 2¹⁶ = 6597773113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6597838609) 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, 222299 + ... + 250224.

It is an arithmetic number, because the mean of its divisors is an integer number (1649581284).

Almost surely, 2^6597838649 is an apocalyptic number.

It is an amenable number.

6597838649 is a deficient number, since it is larger than the sum of its proper divisors (486487).

6597838649 is a wasteful number, since it uses less digits than its factorization.

6597838649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486486.

The product of its digits is 78382080, while the sum is 65.

The square root of 6597838649 is about 81227.0807612831. The cubic root of 6597838649 is about 1875.5726747551.

The spelling of 6597838649 in words is "six billion, five hundred ninety-seven million, eight hundred thirty-eight thousand, six hundred forty-nine".