989525172993 has 16 divisors (see below), whose sum is σ = 1514994087936. Its totient is φ = 562763129040.

The previous prime is 989525172931. The next prime is 989525173003. The reversal of 989525172993 is 399271525989.

It is not a de Polignac number, because 989525172993 - 2⁶ = 989525172929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989525170993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111654921 + ... + 111663782.

It is an arithmetic number, because the mean of its divisors is an integer number (94687130496).

Almost surely, 2^989525172993 is an apocalyptic number.

It is an amenable number.

989525172993 is a deficient number, since it is larger than the sum of its proper divisors (525468914943).

989525172993 is a wasteful number, since it uses less digits than its factorization.

989525172993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223318924.

The product of its digits is 110224800, while the sum is 69.

The spelling of 989525172993 in words is "nine hundred eighty-nine billion, five hundred twenty-five million, one hundred seventy-two thousand, nine hundred ninety-three".