78694223565716 has 24 divisors (see below), whose sum is σ = 152350404655680. Its totient is φ = 35266297371200.

The previous prime is 78694223565689. The next prime is 78694223565739. The reversal of 78694223565716 is 61756532249687.

It is a super-2 number, since 2×78694223565716² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a self number, because there is not a number n which added to its sum of digits gives 78694223565716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12595103081 + ... + 12595109328.

It is an arithmetic number, because the mean of its divisors is an integer number (6347933527320).

Almost surely, 2^{78694223565716} is an apocalyptic number.

It is an amenable number.

78694223565716 is a deficient number, since it is larger than the sum of its proper divisors (73656181089964).

78694223565716 is a wasteful number, since it uses less digits than its factorization.

78694223565716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25190212495 (or 25190212493 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 71.

The spelling of 78694223565716 in words is "seventy-eight trillion, six hundred ninety-four billion, two hundred twenty-three million, five hundred sixty-five thousand, seven hundred sixteen".