6491006495 has 4 divisors (see below), whose sum is σ = 7789207800. Its totient is φ = 5192805192.

The previous prime is 6491006443. The next prime is 6491006507. The reversal of 6491006495 is 5946001946.

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 6491006495 - 2¹⁶ = 6490940959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649100645 + ... + 649100654.

It is an arithmetic number, because the mean of its divisors is an integer number (1947301950).

Almost surely, 2^6491006495 is an apocalyptic number.

6491006495 is a deficient number, since it is larger than the sum of its proper divisors (1298201305).

6491006495 is a wasteful number, since it uses less digits than its factorization.

6491006495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298201304.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 6491006495 is about 80566.7828264230. The cubic root of 6491006495 is about 1865.3944540094.

The spelling of 6491006495 in words is "six billion, four hundred ninety-one million, six thousand, four hundred ninety-five".