775606069225 has 81 divisors (see below), whose sum is σ = 1107676787277. Its totient is φ = 538387399680.

The previous prime is 775606069219. The next prime is 775606069283. The reversal of 775606069225 is 522960606577.

The square root of 775606069225 is 880685.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 40 ways, for example, as 727330948569 + 48275120656 = 852837^2 + 219716^2 .

It is not a de Polignac number, because 775606069225 - 2¹⁹ = 775605544937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 973156527 + ... + 973157323.

Almost surely, 2^775606069225 is an apocalyptic number.

775606069225 is the 880685-th square number.

775606069225 is the 440343-rd centered octagonal number.

It is an amenable number.

775606069225 is a deficient number, since it is larger than the sum of its proper divisors (332070718052).

775606069225 is an equidigital number, since it uses as much as digits as its factorization.

775606069225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 775606069225 in words is "seven hundred seventy-five billion, six hundred six million, sixty-nine thousand, two hundred twenty-five".