1009782565 has 16 divisors (see below), whose sum is σ = 1337829696. Its totient is φ = 725536000.

The previous prime is 1009782539. The next prime is 1009782583. The reversal of 1009782565 is 5652879001.

It is not a de Polignac number, because 1009782565 - 2⁵ = 1009782533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 106036 + ... + 115165.

It is an arithmetic number, because the mean of its divisors is an integer number (83614356).

Almost surely, 2^1009782565 is an apocalyptic number.

It is an amenable number.

1009782565 is a deficient number, since it is larger than the sum of its proper divisors (328047131).

1009782565 is a wasteful number, since it uses less digits than its factorization.

1009782565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221300.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 1009782565 is about 31777.0760926804. The cubic root of 1009782565 is about 1003.2502792392.

The spelling of 1009782565 in words is "one billion, nine million, seven hundred eighty-two thousand, five hundred sixty-five".