6449891494463 has 2 divisors, whose sum is σ = 6449891494464. Its totient is φ = 6449891494462.

The previous prime is 6449891494451. The next prime is 6449891494547. The reversal of 6449891494463 is 3644941989446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6449891494463 - 2²² = 6449887300159 is a prime.

It is a super-2 number, since 2×6449891494463² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6449891494363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224945747231 + 3224945747232.

It is an arithmetic number, because the mean of its divisors is an integer number (3224945747232).

Almost surely, 2^{6449891494463} is an apocalyptic number.

6449891494463 is a deficient number, since it is larger than the sum of its proper divisors (1).

6449891494463 is an equidigital number, since it uses as much as digits as its factorization.

6449891494463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 644972544, while the sum is 71.

The spelling of 6449891494463 in words is "six trillion, four hundred forty-nine billion, eight hundred ninety-one million, four hundred ninety-four thousand, four hundred sixty-three".