77986994143 has 2 divisors, whose sum is σ = 77986994144. Its totient is φ = 77986994142.

The previous prime is 77986994117. The next prime is 77986994201. The reversal of 77986994143 is 34149968977.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77986994143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77986992143) 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, 38993497071 + 38993497072.

It is an arithmetic number, because the mean of its divisors is an integer number (38993497072).

Almost surely, 2^77986994143 is an apocalyptic number.

77986994143 is a deficient number, since it is larger than the sum of its proper divisors (1).

77986994143 is an equidigital number, since it uses as much as digits as its factorization.

77986994143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 67.

The spelling of 77986994143 in words is "seventy-seven billion, nine hundred eighty-six million, nine hundred ninety-four thousand, one hundred forty-three".