9999575585 has 4 divisors (see below), whose sum is σ = 11999490708. Its totient is φ = 7999660464.

The previous prime is 9999575557. The next prime is 9999575587. The reversal of 9999575585 is 5855759999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5855759999 = 3049 ⋅1920551.

It can be written as a sum of positive squares in 2 ways, for example, as 6907770769 + 3091804816 = 83113^2 + 55604^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999575585 - 2⁸ = 9999575329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9999575587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999957554 + ... + 999957563.

It is an arithmetic number, because the mean of its divisors is an integer number (2999872677).

Almost surely, 2^9999575585 is an apocalyptic number.

It is an amenable number.

9999575585 is a deficient number, since it is larger than the sum of its proper divisors (1999915123).

9999575585 is a wasteful number, since it uses less digits than its factorization.

9999575585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999915122.

The product of its digits is 229635000, while the sum is 71.

The square root of 9999575585 is about 99997.8779024835. The cubic root of 9999575585 is about 2154.4042104540.

The spelling of 9999575585 in words is "nine billion, nine hundred ninety-nine million, five hundred seventy-five thousand, five hundred eighty-five".