865774068149 has 2 divisors, whose sum is σ = 865774068150. Its totient is φ = 865774068148.

The previous prime is 865774068109. The next prime is 865774068163. The reversal of 865774068149 is 941860477568.

865774068149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601570872100 + 264203196049 = 775610^2 + 514007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865774068149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865774068109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432887034074 + 432887034075.

It is an arithmetic number, because the mean of its divisors is an integer number (432887034075).

Almost surely, 2^865774068149 is an apocalyptic number.

It is an amenable number.

865774068149 is a deficient number, since it is larger than the sum of its proper divisors (1).

865774068149 is an equidigital number, since it uses as much as digits as its factorization.

865774068149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 865774068149 in words is "eight hundred sixty-five billion, seven hundred seventy-four million, sixty-eight thousand, one hundred forty-nine".