6171256560865 has 16 divisors (see below), whose sum is σ = 8078846475456. Its totient is φ = 4488125137600.

The previous prime is 6171256560809. The next prime is 6171256560869. The reversal of 6171256560865 is 5680656521716.

It is a happy number.

It is not a de Polignac number, because 6171256560865 - 2⁷ = 6171256560737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6171256560869) 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 in 15 ways as a sum of consecutive naturals, for example, 3498855 + ... + 4958275.

It is an arithmetic number, because the mean of its divisors is an integer number (504927904716).

Almost surely, 2^{6171256560865} is an apocalyptic number.

It is an amenable number.

6171256560865 is a deficient number, since it is larger than the sum of its proper divisors (1907589914591).

6171256560865 is a wasteful number, since it uses less digits than its factorization.

6171256560865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536320.

The product of its (nonzero) digits is 18144000, while the sum is 58.

The spelling of 6171256560865 in words is "six trillion, one hundred seventy-one billion, two hundred fifty-six million, five hundred sixty thousand, eight hundred sixty-five".