775213263817 has 2 divisors, whose sum is σ = 775213263818. Its totient is φ = 775213263816.

The previous prime is 775213263743. The next prime is 775213263833. The reversal of 775213263817 is 718362312577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530018944576 + 245194319241 = 728024^2 + 495171^2 .

It is a cyclic number.

It is not a de Polignac number, because 775213263817 - 2¹¹ = 775213261769 is a prime.

It is not a weakly prime, because it can be changed into another prime (775213263887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387606631908 + 387606631909.

It is an arithmetic number, because the mean of its divisors is an integer number (387606631909).

Almost surely, 2^775213263817 is an apocalyptic number.

It is an amenable number.

775213263817 is a deficient number, since it is larger than the sum of its proper divisors (1).

775213263817 is an equidigital number, since it uses as much as digits as its factorization.

775213263817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The spelling of 775213263817 in words is "seven hundred seventy-five billion, two hundred thirteen million, two hundred sixty-three thousand, eight hundred seventeen".