78000844111 has 2 divisors, whose sum is σ = 78000844112. Its totient is φ = 78000844110.

The previous prime is 78000844109. The next prime is 78000844157. The reversal of 78000844111 is 11144800087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78000844111 - 2¹ = 78000844109 is a prime.

Together with 78000844109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78000844211) by changing a digit.

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 as a sum of consecutive naturals, namely, 39000422055 + 39000422056.

It is an arithmetic number, because the mean of its divisors is an integer number (39000422056).

Almost surely, 2^78000844111 is an apocalyptic number.

78000844111 is a deficient number, since it is larger than the sum of its proper divisors (1).

78000844111 is an equidigital number, since it uses as much as digits as its factorization.

78000844111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

The spelling of 78000844111 in words is "seventy-eight billion, eight hundred forty-four thousand, one hundred eleven".