77091264917 has 2 divisors, whose sum is σ = 77091264918. Its totient is φ = 77091264916.

The previous prime is 77091264883. The next prime is 77091264953. The reversal of 77091264917 is 71946219077.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64005964036 + 13085300881 = 252994^2 + 114391^2 .

It is a cyclic number.

It is not a de Polignac number, because 77091264917 - 2³⁶ = 8371788181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77091264997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38545632458 + 38545632459.

It is an arithmetic number, because the mean of its divisors is an integer number (38545632459).

Almost surely, 2^77091264917 is an apocalyptic number.

It is an amenable number.

77091264917 is a deficient number, since it is larger than the sum of its proper divisors (1).

77091264917 is an equidigital number, since it uses as much as digits as its factorization.

77091264917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 77091264917 in words is "seventy-seven billion, ninety-one million, two hundred sixty-four thousand, nine hundred seventeen".