6864781453913 has 2 divisors, whose sum is σ = 6864781453914. Its totient is φ = 6864781453912.

The previous prime is 6864781453781. The next prime is 6864781453921. The reversal of 6864781453913 is 3193541874686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4965423392329 + 1899358061584 = 2228323^2 + 1378172^2 .

It is a cyclic number.

It is not a de Polignac number, because 6864781453913 - 2¹⁰ = 6864781452889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6864781453913.

It is not a weakly prime, because it can be changed into another prime (6864781453963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432390726956 + 3432390726957.

It is an arithmetic number, because the mean of its divisors is an integer number (3432390726957).

Almost surely, 2^{6864781453913} is an apocalyptic number.

It is an amenable number.

6864781453913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6864781453913 is an equidigital number, since it uses as much as digits as its factorization.

6864781453913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 65.

The spelling of 6864781453913 in words is "six trillion, eight hundred sixty-four billion, seven hundred eighty-one million, four hundred fifty-three thousand, nine hundred thirteen".