78613216243 has 16 divisors (see below), whose sum is σ = 84444314400. Its totient is φ = 72955883520.

The previous prime is 78613216219. The next prime is 78613216261. The reversal of 78613216243 is 34261231687.

It is a cyclic number.

It is not a de Polignac number, because 78613216243 - 2²⁹ = 78076345331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78613216243.

It is not an unprimeable number, because it can be changed into a prime (78613216543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584593 + ... + 706381.

It is an arithmetic number, because the mean of its divisors is an integer number (5277769650).

Almost surely, 2^78613216243 is an apocalyptic number.

78613216243 is a deficient number, since it is larger than the sum of its proper divisors (5831098157).

78613216243 is a wasteful number, since it uses less digits than its factorization.

78613216243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122502.

The product of its digits is 290304, while the sum is 43.

The spelling of 78613216243 in words is "seventy-eight billion, six hundred thirteen million, two hundred sixteen thousand, two hundred forty-three".