775777255 has 16 divisors (see below), whose sum is σ = 1030725504. Its totient is φ = 555778080.

The previous prime is 775777237. The next prime is 775777259. The reversal of 775777255 is 552777577.

It is not a de Polignac number, because 775777255 - 2¹¹ = 775775207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775777259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101577 + ... + 108946.

It is an arithmetic number, because the mean of its divisors is an integer number (64420344).

Almost surely, 2^775777255 is an apocalyptic number.

775777255 is a deficient number, since it is larger than the sum of its proper divisors (254948249).

775777255 is a wasteful number, since it uses less digits than its factorization.

775777255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210606.

The product of its digits is 4201750, while the sum is 52.

The square root of 775777255 is about 27852.7782276742. The cubic root of 775777255 is about 918.8522450574.

The spelling of 775777255 in words is "seven hundred seventy-five million, seven hundred seventy-seven thousand, two hundred fifty-five".