773770561 has 2 divisors, whose sum is σ = 773770562. Its totient is φ = 773770560.

The previous prime is 773770523. The next prime is 773770579. The reversal of 773770561 is 165077377.

773770561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762588225 + 11182336 = 27615^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 773770561 - 2¹⁵ = 773737793 is a prime.

It is not a weakly prime, because it can be changed into another prime (773770511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386885280 + 386885281.

It is an arithmetic number, because the mean of its divisors is an integer number (386885281).

Almost surely, 2^773770561 is an apocalyptic number.

It is an amenable number.

773770561 is a deficient number, since it is larger than the sum of its proper divisors (1).

773770561 is an equidigital number, since it uses as much as digits as its factorization.

773770561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216090, while the sum is 43.

The square root of 773770561 is about 27816.7316735809. The cubic root of 773770561 is about 918.0592994921.

The spelling of 773770561 in words is "seven hundred seventy-three million, seven hundred seventy thousand, five hundred sixty-one".