989745460823 has 16 divisors (see below), whose sum is σ = 1147121224704. Its totient is φ = 836366670720.

The previous prime is 989745460819. The next prime is 989745460829. The reversal of 989745460823 is 328064547989.

It is not a de Polignac number, because 989745460823 - 2² = 989745460819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989745460823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989745460829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18942911 + ... + 18995087.

It is an arithmetic number, because the mean of its divisors is an integer number (71695076544).

Almost surely, 2^989745460823 is an apocalyptic number.

989745460823 is a deficient number, since it is larger than the sum of its proper divisors (157375763881).

989745460823 is a wasteful number, since it uses less digits than its factorization.

989745460823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90422.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 989745460823 in words is "nine hundred eighty-nine billion, seven hundred forty-five million, four hundred sixty thousand, eight hundred twenty-three".