6543807571913 has 2 divisors, whose sum is σ = 6543807571914. Its totient is φ = 6543807571912.

The previous prime is 6543807571909. The next prime is 6543807571919. The reversal of 6543807571913 is 3191757083456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6533478508489 + 10329063424 = 2556067^2 + 101632^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543807571913 - 2² = 6543807571909 is a prime.

It is not a weakly prime, because it can be changed into another prime (6543807571919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271903785956 + 3271903785957.

It is an arithmetic number, because the mean of its divisors is an integer number (3271903785957).

Almost surely, 2^{6543807571913} is an apocalyptic number.

It is an amenable number.

6543807571913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543807571913 is an equidigital number, since it uses as much as digits as its factorization.

6543807571913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 6543807571913 in words is "six trillion, five hundred forty-three billion, eight hundred seven million, five hundred seventy-one thousand, nine hundred thirteen".