6649595196591 has 32 divisors (see below), whose sum is σ = 9425021112000. Its totient is φ = 4170136273920.

The previous prime is 6649595196539. The next prime is 6649595196617. The reversal of 6649595196591 is 1956915959466.

It is not a de Polignac number, because 6649595196591 - 2¹⁰ = 6649595195567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649595196511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28610571 + ... + 28842051.

It is an arithmetic number, because the mean of its divisors is an integer number (294531909750).

Almost surely, 2^{6649595196591} is an apocalyptic number.

6649595196591 is a deficient number, since it is larger than the sum of its proper divisors (2775425915409).

6649595196591 is a wasteful number, since it uses less digits than its factorization.

6649595196591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233484 (or 233450 counting only the distinct ones).

The product of its digits is 708588000, while the sum is 75.

The spelling of 6649595196591 in words is "six trillion, six hundred forty-nine billion, five hundred ninety-five million, one hundred ninety-six thousand, five hundred ninety-one".