775816625 has 16 divisors (see below), whose sum is σ = 981493968. Its totient is φ = 612144000.

The previous prime is 775816603. The next prime is 775816663. The reversal of 775816625 is 526618577.

775816625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 277455649 + 498360976 = 16657^2 + 22324^2 .

It is not a de Polignac number, because 775816625 - 2¹² = 775812529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 775816625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33386 + ... + 51635.

It is an arithmetic number, because the mean of its divisors is an integer number (61343373).

Almost surely, 2^775816625 is an apocalyptic number.

It is an amenable number.

775816625 is a deficient number, since it is larger than the sum of its proper divisors (205677343).

775816625 is an equidigital number, since it uses as much as digits as its factorization.

775816625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85109 (or 85099 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 775816625 is about 27853.4849704664. The cubic root of 775816625 is about 918.8677884369.

The spelling of 775816625 in words is "seven hundred seventy-five million, eight hundred sixteen thousand, six hundred twenty-five".