9778448767 has 2 divisors, whose sum is σ = 9778448768. Its totient is φ = 9778448766.

The previous prime is 9778448737. The next prime is 9778448831. The reversal of 9778448767 is 7678448779.

It is a weak prime.

It is an emirp because it is prime and its reverse (7678448779) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9778448767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9778448737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889224383 + 4889224384.

It is an arithmetic number, because the mean of its divisors is an integer number (4889224384).

Almost surely, 2^9778448767 is an apocalyptic number.

9778448767 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778448767 is an equidigital number, since it uses as much as digits as its factorization.

9778448767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132765696, while the sum is 67.

The square root of 9778448767 is about 98886.0392927131. The cubic root of 9778448767 is about 2138.4051329912.

The spelling of 9778448767 in words is "nine billion, seven hundred seventy-eight million, four hundred forty-eight thousand, seven hundred sixty-seven".