773645086289 has 2 divisors, whose sum is σ = 773645086290. Its totient is φ = 773645086288.

The previous prime is 773645086273. The next prime is 773645086327. The reversal of 773645086289 is 982680546377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 569282322064 + 204362764225 = 754508^2 + 452065^2 .

It is a cyclic number.

It is not a de Polignac number, because 773645086289 - 2⁴ = 773645086273 is a prime.

It is a super-2 number, since 2×773645086289² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (773645086589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386822543144 + 386822543145.

It is an arithmetic number, because the mean of its divisors is an integer number (386822543145).

Almost surely, 2^773645086289 is an apocalyptic number.

It is an amenable number.

773645086289 is a deficient number, since it is larger than the sum of its proper divisors (1).

773645086289 is an equidigital number, since it uses as much as digits as its factorization.

773645086289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 773645086289 in words is "seven hundred seventy-three billion, six hundred forty-five million, eighty-six thousand, two hundred eighty-nine".