6491376319913 has 2 divisors, whose sum is σ = 6491376319914. Its totient is φ = 6491376319912.

The previous prime is 6491376319903. The next prime is 6491376319919. The reversal of 6491376319913 is 3199136731946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5298711383449 + 1192664936464 = 2301893^2 + 1092092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491376319913 is a prime.

It is not a weakly prime, because it can be changed into another prime (6491376319919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245688159956 + 3245688159957.

It is an arithmetic number, because the mean of its divisors is an integer number (3245688159957).

Almost surely, 2^{6491376319913} is an apocalyptic number.

It is an amenable number.

6491376319913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491376319913 is an equidigital number, since it uses as much as digits as its factorization.

6491376319913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19840464, while the sum is 62.

The spelling of 6491376319913 in words is "six trillion, four hundred ninety-one billion, three hundred seventy-six million, three hundred nineteen thousand, nine hundred thirteen".