83864684777 has 2 divisors, whose sum is σ = 83864684778. Its totient is φ = 83864684776.

The previous prime is 83864684773. The next prime is 83864684899. The reversal of 83864684777 is 77748646838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82635551296 + 1229133481 = 287464^2 + 35059^2 .

It is a cyclic number.

It is not a de Polignac number, because 83864684777 - 2² = 83864684773 is a prime.

It is not a weakly prime, because it can be changed into another prime (83864684773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41932342388 + 41932342389.

It is an arithmetic number, because the mean of its divisors is an integer number (41932342389).

Almost surely, 2^83864684777 is an apocalyptic number.

It is an amenable number.

83864684777 is a deficient number, since it is larger than the sum of its proper divisors (1).

83864684777 is an equidigital number, since it uses as much as digits as its factorization.

83864684777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 303464448, while the sum is 68.

The spelling of 83864684777 in words is "eighty-three billion, eight hundred sixty-four million, six hundred eighty-four thousand, seven hundred seventy-seven".