78565568794 has 16 divisors (see below), whose sum is σ = 119358832320. Its totient is φ = 38780010720.

The previous prime is 78565568771. The next prime is 78565568801. The reversal of 78565568794 is 49786556587.

It is a super-2 number, since 2×78565568794² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40147 + ... + 398425.

It is an arithmetic number, because the mean of its divisors is an integer number (7459927020).

Almost surely, 2^78565568794 is an apocalyptic number.

78565568794 is a deficient number, since it is larger than the sum of its proper divisors (40793263526).

78565568794 is a wasteful number, since it uses less digits than its factorization.

78565568794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359685.

The product of its digits is 508032000, while the sum is 70.

The spelling of 78565568794 in words is "seventy-eight billion, five hundred sixty-five million, five hundred sixty-eight thousand, seven hundred ninety-four".