775344656 has 20 divisors (see below), whose sum is σ = 1506269292. Its totient is φ = 386630016.

The previous prime is 775344617. The next prime is 775344659. The reversal of 775344656 is 656443577.

It can be written as a sum of positive squares in 2 ways, for example, as 487703056 + 287641600 = 22084^2 + 16960^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 775344656.

It is not an unprimeable number, because it can be changed into a prime (775344659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58991 + ... + 70926.

Almost surely, 2^775344656 is an apocalyptic number.

It is an amenable number.

775344656 is a deficient number, since it is larger than the sum of its proper divisors (730924636).

775344656 is a wasteful number, since it uses less digits than its factorization.

775344656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130298 (or 130292 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 47.

The square root of 775344656 is about 27845.0113305777. The cubic root of 775344656 is about 918.6814191886.

The spelling of 775344656 in words is "seven hundred seventy-five million, three hundred forty-four thousand, six hundred fifty-six".