77895316223909 has 2 divisors, whose sum is σ = 77895316223910. Its totient is φ = 77895316223908.

The previous prime is 77895316223887. The next prime is 77895316224067. The reversal of 77895316223909 is 90932261359877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77772468076900 + 122848147009 = 8818870^2 + 350497^2 .

It is a cyclic number.

It is not a de Polignac number, because 77895316223909 - 2⁸ = 77895316223653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77895316226909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38947658111954 + 38947658111955.

It is an arithmetic number, because the mean of its divisors is an integer number (38947658111955).

Almost surely, 2^{77895316223909} is an apocalyptic number.

It is an amenable number.

77895316223909 is a deficient number, since it is larger than the sum of its proper divisors (1).

77895316223909 is an equidigital number, since it uses as much as digits as its factorization.

77895316223909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 308629440, while the sum is 71.

The spelling of 77895316223909 in words is "seventy-seven trillion, eight hundred ninety-five billion, three hundred sixteen million, two hundred twenty-three thousand, nine hundred nine".