9851661589 has 32 divisors (see below), whose sum is σ = 12788681472. Its totient is φ = 7366464000.

The previous prime is 9851661581. The next prime is 9851661593.

9851661589 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9851661589 - 2³ = 9851661581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9851661581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166999 + ... + 218155.

It is an arithmetic number, because the mean of its divisors is an integer number (399646296).

Almost surely, 2^9851661589 is an apocalyptic number.

It is an amenable number.

9851661589 is a deficient number, since it is larger than the sum of its proper divisors (2937019883).

9851661589 is a wasteful number, since it uses less digits than its factorization.

9851661589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51277.

The product of its digits is 4665600, while the sum is 58.

The square root of 9851661589 is about 99255.5368178521. The cubic root of 9851661589 is about 2143.7287301037.

The spelling of 9851661589 in words is "nine billion, eight hundred fifty-one million, six hundred sixty-one thousand, five hundred eighty-nine".