6456961286815 has 16 divisors (see below), whose sum is σ = 8344454025600. Its totient is φ = 4768175688192.

The previous prime is 6456961286749. The next prime is 6456961286857. The reversal of 6456961286815 is 5186821696546.

It is a cyclic number.

It is not a de Polignac number, because 6456961286815 - 2²¹ = 6456959189663 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 8382631 + ... + 9120439.

It is an arithmetic number, because the mean of its divisors is an integer number (521528376600).

Almost surely, 2^{6456961286815} is an apocalyptic number.

6456961286815 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6456961286815 is a deficient number, since it is larger than the sum of its proper divisors (1887492738785).

6456961286815 is a wasteful number, since it uses less digits than its factorization.

6456961286815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872466.

The product of its digits is 149299200, while the sum is 67.

The spelling of 6456961286815 in words is "six trillion, four hundred fifty-six billion, nine hundred sixty-one million, two hundred eighty-six thousand, eight hundred fifteen".