8778764297 has 2 divisors, whose sum is σ = 8778764298. Its totient is φ = 8778764296.

The previous prime is 8778764251. The next prime is 8778764303. The reversal of 8778764297 is 7924678778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5431100416 + 3347663881 = 73696^2 + 57859^2 .

It is a cyclic number.

It is not a de Polignac number, because 8778764297 - 2²⁰ = 8777715721 is a prime.

It is not a weakly prime, because it can be changed into another prime (8778760297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4389382148 + 4389382149.

It is an arithmetic number, because the mean of its divisors is an integer number (4389382149).

Almost surely, 2^8778764297 is an apocalyptic number.

It is an amenable number.

8778764297 is a deficient number, since it is larger than the sum of its proper divisors (1).

8778764297 is an equidigital number, since it uses as much as digits as its factorization.

8778764297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66382848, while the sum is 65.

The square root of 8778764297 is about 93695.0601526036. The cubic root of 8778764297 is about 2062.8981967725.

The spelling of 8778764297 in words is "eight billion, seven hundred seventy-eight million, seven hundred sixty-four thousand, two hundred ninety-seven".