6498616591 has 2 divisors, whose sum is σ = 6498616592. Its totient is φ = 6498616590.

The previous prime is 6498616589. The next prime is 6498616637. The reversal of 6498616591 is 1956168946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6498616591 - 2¹ = 6498616589 is a prime.

It is a super-2 number, since 2×6498616591² = 84464035193640922562, which contains 22 as substring.

Together with 6498616589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6498616511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249308295 + 3249308296.

It is an arithmetic number, because the mean of its divisors is an integer number (3249308296).

Almost surely, 2^6498616591 is an apocalyptic number.

6498616591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6498616591 is an equidigital number, since it uses as much as digits as its factorization.

6498616591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The square root of 6498616591 is about 80613.9974880293. The cubic root of 6498616591 is about 1866.1231692831.

The spelling of 6498616591 in words is "six billion, four hundred ninety-eight million, six hundred sixteen thousand, five hundred ninety-one".