775749403049 has 2 divisors, whose sum is σ = 775749403050. Its totient is φ = 775749403048.

The previous prime is 775749403001. The next prime is 775749403057. The reversal of 775749403049 is 940304947577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654631482649 + 121117920400 = 809093^2 + 348020^2 .

It is a cyclic number.

It is not a de Polignac number, because 775749403049 - 2¹² = 775749398953 is a prime.

It is not a weakly prime, because it can be changed into another prime (775749403549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387874701524 + 387874701525.

It is an arithmetic number, because the mean of its divisors is an integer number (387874701525).

Almost surely, 2^775749403049 is an apocalyptic number.

It is an amenable number.

775749403049 is a deficient number, since it is larger than the sum of its proper divisors (1).

775749403049 is an equidigital number, since it uses as much as digits as its factorization.

775749403049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26671680, while the sum is 59.

The spelling of 775749403049 in words is "seven hundred seventy-five billion, seven hundred forty-nine million, four hundred three thousand, forty-nine".