78564653137685 has 96 divisors (see below), whose sum is σ = 115242018278400. Its totient is φ = 50909189560320.

The previous prime is 78564653137679. The next prime is 78564653137709. The reversal of 78564653137685 is 58673135646587.

It is not a de Polignac number, because 78564653137685 - 2²² = 78564648943381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 968470556 + ... + 968551674.

It is an arithmetic number, because the mean of its divisors is an integer number (1200437690400).

Almost surely, 2^{78564653137685} is an apocalyptic number.

It is an amenable number.

78564653137685 is a deficient number, since it is larger than the sum of its proper divisors (36677365140715).

78564653137685 is a wasteful number, since it uses less digits than its factorization.

78564653137685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84783 (or 84770 counting only the distinct ones).

The product of its digits is 3048192000, while the sum is 74.

The spelling of 78564653137685 in words is "seventy-eight trillion, five hundred sixty-four billion, six hundred fifty-three million, one hundred thirty-seven thousand, six hundred eighty-five".