78543820814 has 16 divisors (see below), whose sum is σ = 124993075200. Its totient is φ = 36912012984.

The previous prime is 78543820807. The next prime is 78543820841. The reversal of 78543820814 is 41802834587.

It is a Curzon number.

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, 8132744 + ... + 8142395.

It is an arithmetic number, because the mean of its divisors is an integer number (7812067200).

Almost surely, 2^78543820814 is an apocalyptic number.

78543820814 is a deficient number, since it is larger than the sum of its proper divisors (46449254386).

78543820814 is a wasteful number, since it uses less digits than its factorization.

78543820814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16275287.

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 78543820814 in words is "seventy-eight billion, five hundred forty-three million, eight hundred twenty thousand, eight hundred fourteen".