9889231646 has 24 divisors (see below), whose sum is σ = 17294727960. Its totient is φ = 4228656432.

The previous prime is 9889231609. The next prime is 9889231657. The reversal of 9889231646 is 6461329889.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9889231591 and 9889231600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70481 + ... + 157308.

It is an arithmetic number, because the mean of its divisors is an integer number (720613665).

Almost surely, 2^9889231646 is an apocalyptic number.

9889231646 is a deficient number, since it is larger than the sum of its proper divisors (7405496314).

9889231646 is a wasteful number, since it uses less digits than its factorization.

9889231646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228248 (or 228241 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 9889231646 is about 99444.6159729123. The cubic root of 9889231646 is about 2146.4503638914.

The spelling of 9889231646 in words is "nine billion, eight hundred eighty-nine million, two hundred thirty-one thousand, six hundred forty-six".