9900432236771 has 4 divisors (see below), whose sum is σ = 9901269352872. Its totient is φ = 9899595120672.

The previous prime is 9900432236657. The next prime is 9900432236839. The reversal of 9900432236771 is 1776322340099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9900432236771 - 2¹⁸ = 9900431974627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9900432236171) 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, 418540310 + ... + 418563963.

It is an arithmetic number, because the mean of its divisors is an integer number (2475317338218).

Almost surely, 2^{9900432236771} is an apocalyptic number.

9900432236771 is a deficient number, since it is larger than the sum of its proper divisors (837116101).

9900432236771 is a wasteful number, since it uses less digits than its factorization.

9900432236771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837116100.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 9900432236771 in words is "nine trillion, nine hundred billion, four hundred thirty-two million, two hundred thirty-six thousand, seven hundred seventy-one".