899542832891 has 4 divisors (see below), whose sum is σ = 899567052000. Its totient is φ = 899518613784.

The previous prime is 899542832833. The next prime is 899542832897. The reversal of 899542832891 is 198238245998.

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 899542832891 - 2¹⁰ = 899542831867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899542832897) 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, 12053756 + ... + 12128153.

It is an arithmetic number, because the mean of its divisors is an integer number (224891763000).

Almost surely, 2^899542832891 is an apocalyptic number.

899542832891 is a deficient number, since it is larger than the sum of its proper divisors (24219109).

899542832891 is a wasteful number, since it uses less digits than its factorization.

899542832891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24219108.

The product of its digits is 89579520, while the sum is 68.

The spelling of 899542832891 in words is "eight hundred ninety-nine billion, five hundred forty-two million, eight hundred thirty-two thousand, eight hundred ninety-one".