3968293257865 has 4 divisors (see below), whose sum is σ = 4761951909444. Its totient is φ = 3174634606288.

The previous prime is 3968293257769. The next prime is 3968293257911. The reversal of 3968293257865 is 5687523928693.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2998123417081 + 970169840784 = 1731509^2 + 984972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3968293257865 is a prime.

It is a Duffinian number.

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, 396829325782 + ... + 396829325791.

It is an arithmetic number, because the mean of its divisors is an integer number (1190487977361).

Almost surely, 2^{3968293257865} is an apocalyptic number.

It is an amenable number.

3968293257865 is a deficient number, since it is larger than the sum of its proper divisors (793658651579).

3968293257865 is an equidigital number, since it uses as much as digits as its factorization.

3968293257865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793658651578.

The product of its digits is 1175731200, while the sum is 73.

The spelling of 3968293257865 in words is "three trillion, nine hundred sixty-eight billion, two hundred ninety-three million, two hundred fifty-seven thousand, eight hundred sixty-five".