9859850561 has 4 divisors (see below), whose sum is σ = 10756200624. Its totient is φ = 8963500500.

The previous prime is 9859850551. The next prime is 9859850569. The reversal of 9859850561 is 1650589589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1650589589 = 11 ⋅150053599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9859850561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9859850497 and 9859850506.

It is not an unprimeable number, because it can be changed into a prime (9859850569) 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, 448175015 + ... + 448175036.

It is an arithmetic number, because the mean of its divisors is an integer number (2689050156).

Almost surely, 2^9859850561 is an apocalyptic number.

It is an amenable number.

9859850561 is a deficient number, since it is larger than the sum of its proper divisors (896350063).

9859850561 is a wasteful number, since it uses less digits than its factorization.

9859850561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896350062.

The product of its (nonzero) digits is 3888000, while the sum is 56.

The square root of 9859850561 is about 99296.7802146676. The cubic root of 9859850561 is about 2144.3225410253.

The spelling of 9859850561 in words is "nine billion, eight hundred fifty-nine million, eight hundred fifty thousand, five hundred sixty-one".