9905786032845 has 32 divisors (see below), whose sum is σ = 15869420923392. Its totient is φ = 5276368858112.

The previous prime is 9905786032823. The next prime is 9905786032847. The reversal of 9905786032845 is 5482306875099.

9905786032845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9905786032845 - 2⁶ = 9905786032781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9905786032847) 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, 39391429 + ... + 39642101.

It is an arithmetic number, because the mean of its divisors is an integer number (495919403856).

Almost surely, 2^{9905786032845} is an apocalyptic number.

It is an amenable number.

9905786032845 is a deficient number, since it is larger than the sum of its proper divisors (5963634890547).

9905786032845 is a wasteful number, since it uses less digits than its factorization.

9905786032845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254021.

The product of its (nonzero) digits is 130636800, while the sum is 66.

The spelling of 9905786032845 in words is "nine trillion, nine hundred five billion, seven hundred eighty-six million, thirty-two thousand, eight hundred forty-five".