6491067196993 has 4 divisors (see below), whose sum is σ = 6613540163028. Its totient is φ = 6368594230960.

The previous prime is 6491067196981. The next prime is 6491067196997. The reversal of 6491067196993 is 3996917601946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5782832181504 + 708235015489 = 2404752^2 + 841567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491067196993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491067196997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61236482938 + ... + 61236483043.

It is an arithmetic number, because the mean of its divisors is an integer number (1653385040757).

Almost surely, 2^{6491067196993} is an apocalyptic number.

It is an amenable number.

6491067196993 is a deficient number, since it is larger than the sum of its proper divisors (122472966035).

6491067196993 is a wasteful number, since it uses less digits than its factorization.

6491067196993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122472966034.

The product of its (nonzero) digits is 119042784, while the sum is 70.

The spelling of 6491067196993 in words is "six trillion, four hundred ninety-one billion, sixty-seven million, one hundred ninety-six thousand, nine hundred ninety-three".