865993545399568 has 20 divisors (see below), whose sum is σ = 1677870725795020. Its totient is φ = 432994648420224.

The previous prime is 865993545399529. The next prime is 865993545399659.

865993545399568 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 309142477672704 + 556851067726864 = 17582448^2 + 23597692^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129401655 + ... + 135929302.

It is an arithmetic number, because the mean of its divisors is an integer number (83893536289751).

Almost surely, 2^{865993545399568} is an apocalyptic number.

It is an amenable number.

865993545399568 is a deficient number, since it is larger than the sum of its proper divisors (811877180395452).

865993545399568 is a wasteful number, since it uses less digits than its factorization.

865993545399568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265534954 (or 265534948 counting only the distinct ones).

The product of its digits is 340122240000, while the sum is 94.

The spelling of 865993545399568 in words is "eight hundred sixty-five trillion, nine hundred ninety-three billion, five hundred forty-five million, three hundred ninety-nine thousand, five hundred sixty-eight".