6491376319919 has 2 divisors, whose sum is σ = 6491376319920. Its totient is φ = 6491376319918.

The previous prime is 6491376319913. The next prime is 6491376320027. The reversal of 6491376319919 is 9199136731946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6491376319919 - 2⁴ = 6491376319903 is a prime.

It is a super-2 number, since 2×6491376319919² (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 (6491376319913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245688159959 + 3245688159960.

It is an arithmetic number, because the mean of its divisors is an integer number (3245688159960).

Almost surely, 2^{6491376319919} is an apocalyptic number.

6491376319919 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491376319919 is an equidigital number, since it uses as much as digits as its factorization.

6491376319919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 68.

The spelling of 6491376319919 in words is "six trillion, four hundred ninety-one billion, three hundred seventy-six million, three hundred nineteen thousand, nine hundred nineteen".