78886844767 has 2 divisors, whose sum is σ = 78886844768. Its totient is φ = 78886844766.

The previous prime is 78886844753. The next prime is 78886844797. The reversal of 78886844767 is 76744868887.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78886844767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78886844767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78886844797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39443422383 + 39443422384.

It is an arithmetic number, because the mean of its divisors is an integer number (39443422384).

Almost surely, 2^78886844767 is an apocalyptic number.

78886844767 is a deficient number, since it is larger than the sum of its proper divisors (1).

78886844767 is an equidigital number, since it uses as much as digits as its factorization.

78886844767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 809238528, while the sum is 73.

The spelling of 78886844767 in words is "seventy-eight billion, eight hundred eighty-six million, eight hundred forty-four thousand, seven hundred sixty-seven".