9895665990 has 64 divisors (see below), whose sum is σ = 27182532096. Its totient is φ = 2258522112.

The previous prime is 9895665973. The next prime is 9895666003. The reversal of 9895665990 is 995665989.

9895665990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108934 + ... + 177926.

It is an arithmetic number, because the mean of its divisors is an integer number (424727064).

Almost surely, 2^9895665990 is an apocalyptic number.

9895665990 is an abundant number, since it is smaller than the sum of its proper divisors (17286866106).

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

9895665990 is a wasteful number, since it uses less digits than its factorization.

9895665990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69693.

The product of its (nonzero) digits is 47239200, while the sum is 66.

The square root of 9895665990 is about 99476.9621068114. The cubic root of 9895665990 is about 2146.9157861561.

The spelling of 9895665990 in words is "nine billion, eight hundred ninety-five million, six hundred sixty-five thousand, nine hundred ninety".