775279045669 has 2 divisors, whose sum is σ = 775279045670. Its totient is φ = 775279045668.

The previous prime is 775279045609. The next prime is 775279045729. The reversal of 775279045669 is 966540972577.

It is a balanced prime because it is at equal distance from previous prime (775279045609) and next prime (775279045729).

It can be written as a sum of positive squares in only one way, i.e., 766973092900 + 8305952769 = 875770^2 + 91137^2 .

It is a cyclic number.

It is not a de Polignac number, because 775279045669 - 2¹¹ = 775279043621 is a prime.

It is a super-2 number, since 2×775279045669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775279045609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387639522834 + 387639522835.

It is an arithmetic number, because the mean of its divisors is an integer number (387639522835).

Almost surely, 2^775279045669 is an apocalyptic number.

It is an amenable number.

775279045669 is a deficient number, since it is larger than the sum of its proper divisors (1).

775279045669 is an equidigital number, since it uses as much as digits as its factorization.

775279045669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200037600, while the sum is 67.

The spelling of 775279045669 in words is "seven hundred seventy-five billion, two hundred seventy-nine million, forty-five thousand, six hundred sixty-nine".