77964788563 has 2 divisors, whose sum is σ = 77964788564. Its totient is φ = 77964788562.

The previous prime is 77964788533. The next prime is 77964788581. The reversal of 77964788563 is 36588746977.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36588746977) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77964788563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77964788492 and 77964788501.

It is not a weakly prime, because it can be changed into another prime (77964788513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38982394281 + 38982394282.

It is an arithmetic number, because the mean of its divisors is an integer number (38982394282).

Almost surely, 2^77964788563 is an apocalyptic number.

77964788563 is a deficient number, since it is larger than the sum of its proper divisors (1).

77964788563 is an equidigital number, since it uses as much as digits as its factorization.

77964788563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 426746880, while the sum is 70.

The spelling of 77964788563 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, five hundred sixty-three".