78632384777 has 2 divisors, whose sum is σ = 78632384778. Its totient is φ = 78632384776.

The previous prime is 78632384737. The next prime is 78632384893. The reversal of 78632384777 is 77748323687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58678279696 + 19954105081 = 242236^2 + 141259^2 .

It is a cyclic number.

It is not a de Polignac number, because 78632384777 - 2²⁴ = 78615607561 is a prime.

It is not a weakly prime, because it can be changed into another prime (78632384737) 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, 39316192388 + 39316192389.

It is an arithmetic number, because the mean of its divisors is an integer number (39316192389).

Almost surely, 2^78632384777 is an apocalyptic number.

It is an amenable number.

78632384777 is a deficient number, since it is larger than the sum of its proper divisors (1).

78632384777 is an equidigital number, since it uses as much as digits as its factorization.

78632384777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66382848, while the sum is 62.

The spelling of 78632384777 in words is "seventy-eight billion, six hundred thirty-two million, three hundred eighty-four thousand, seven hundred seventy-seven".