775342239481 has 2 divisors, whose sum is σ = 775342239482. Its totient is φ = 775342239480.

The previous prime is 775342239389. The next prime is 775342239499. The reversal of 775342239481 is 184932243577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740004255225 + 35337984256 = 860235^2 + 187984^2 .

It is a cyclic number.

It is not a de Polignac number, because 775342239481 - 2⁹ = 775342238969 is a prime.

It is a super-2 number, since 2×775342239481² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (775342039481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387671119740 + 387671119741.

It is an arithmetic number, because the mean of its divisors is an integer number (387671119741).

Almost surely, 2^775342239481 is an apocalyptic number.

It is an amenable number.

775342239481 is a deficient number, since it is larger than the sum of its proper divisors (1).

775342239481 is an equidigital number, since it uses as much as digits as its factorization.

775342239481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 55.

The spelling of 775342239481 in words is "seven hundred seventy-five billion, three hundred forty-two million, two hundred thirty-nine thousand, four hundred eighty-one".