865348151316421 has 2 divisors, whose sum is σ = 865348151316422. Its totient is φ = 865348151316420.

The previous prime is 865348151316359. The next prime is 865348151316427. The reversal of 865348151316421 is 124613151843568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757896164847396 + 107451986469025 = 27529914^2 + 10365905^2 .

It is a cyclic number.

It is not a de Polignac number, because 865348151316421 - 2²⁷ = 865348017098693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865348151316427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432674075658210 + 432674075658211.

It is an arithmetic number, because the mean of its divisors is an integer number (432674075658211).

Almost surely, 2^{865348151316421} is an apocalyptic number.

It is an amenable number.

865348151316421 is a deficient number, since it is larger than the sum of its proper divisors (1).

865348151316421 is an equidigital number, since it uses as much as digits as its factorization.

865348151316421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16588800, while the sum is 58.

The spelling of 865348151316421 in words is "eight hundred sixty-five trillion, three hundred forty-eight billion, one hundred fifty-one million, three hundred sixteen thousand, four hundred twenty-one".