78467844656863 has 4 divisors (see below), whose sum is σ = 78468100808328. Its totient is φ = 78467588505400.

The previous prime is 78467844656827. The next prime is 78467844656893. The reversal of 78467844656863 is 36865644876487.

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

It is a cyclic number.

It is not a de Polignac number, because 78467844656863 - 2³³ = 78459254722271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78467844656813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127615681 + ... + 128229082.

It is an arithmetic number, because the mean of its divisors is an integer number (19617025202082).

Almost surely, 2^{78467844656863} is an apocalyptic number.

78467844656863 is a deficient number, since it is larger than the sum of its proper divisors (256151465).

78467844656863 is a wasteful number, since it uses less digits than its factorization.

78467844656863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256151464.

The product of its digits is 31213486080, while the sum is 82.

The spelling of 78467844656863 in words is "seventy-eight trillion, four hundred sixty-seven billion, eight hundred forty-four million, six hundred fifty-six thousand, eight hundred sixty-three".