775563645 has 16 divisors (see below), whose sum is σ = 1245851712. Its totient is φ = 411984000.

The previous prime is 775563637. The next prime is 775563661. The reversal of 775563645 is 546365577.

It is not a de Polignac number, because 775563645 - 2³ = 775563637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775563594 and 775563603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99232 + ... + 106761.

It is an arithmetic number, because the mean of its divisors is an integer number (77865732).

Almost surely, 2^775563645 is an apocalyptic number.

It is an amenable number.

775563645 is a deficient number, since it is larger than the sum of its proper divisors (470288067).

775563645 is a wasteful number, since it uses less digits than its factorization.

775563645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206252.

The product of its digits is 2646000, while the sum is 48.

The square root of 775563645 is about 27848.9433372256. The cubic root of 775563645 is about 918.7679020992.

The spelling of 775563645 in words is "seven hundred seventy-five million, five hundred sixty-three thousand, six hundred forty-five".