9809265985 has 16 divisors (see below), whose sum is σ = 12332201472. Its totient is φ = 7480915200.

The previous prime is 9809265959. The next prime is 9809266009. The reversal of 9809265985 is 5895629089.

It is not a de Polignac number, because 9809265985 - 2²³ = 9800877377 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461896 + ... + 482665.

It is an arithmetic number, because the mean of its divisors is an integer number (770762592).

Almost surely, 2^9809265985 is an apocalyptic number.

It is an amenable number.

9809265985 is a deficient number, since it is larger than the sum of its proper divisors (2522935487).

9809265985 is a wasteful number, since it uses less digits than its factorization.

9809265985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944664.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The square root of 9809265985 is about 99041.7386004507. The cubic root of 9809265985 is about 2140.6492036363.

The spelling of 9809265985 in words is "nine billion, eight hundred nine million, two hundred sixty-five thousand, nine hundred eighty-five".