9865545852 has 24 divisors (see below), whose sum is σ = 23023115136. Its totient is φ = 3288014128.

The previous prime is 9865545847. The next prime is 9865545887. The reversal of 9865545852 is 2585455689.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9865545792 and 9865545801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24193 + ... + 142535.

It is an arithmetic number, because the mean of its divisors is an integer number (959296464).

Almost surely, 2^9865545852 is an apocalyptic number.

It is an amenable number.

9865545852 is an abundant number, since it is smaller than the sum of its proper divisors (13157569284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9865545852 is a wasteful number, since it uses less digits than its factorization.

9865545852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125297 (or 125295 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 57.

The square root of 9865545852 is about 99325.4541998173. The cubic root of 9865545852 is about 2144.7353326164.

The spelling of 9865545852 in words is "nine billion, eight hundred sixty-five million, five hundred forty-five thousand, eight hundred fifty-two".