989649722799 has 64 divisors (see below), whose sum is σ = 1495203840000. Its totient is φ = 646825450752.

The previous prime is 989649722777. The next prime is 989649722801. The reversal of 989649722799 is 997227946989.

It is not a de Polignac number, because 989649722799 - 2⁸ = 989649722543 is a prime.

It is a super-2 number, since 2×989649722799² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989649722729) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193326162 + ... + 193331280.

It is an arithmetic number, because the mean of its divisors is an integer number (23362560000).

Almost surely, 2^989649722799 is an apocalyptic number.

989649722799 is a deficient number, since it is larger than the sum of its proper divisors (505554117201).

989649722799 is a wasteful number, since it uses less digits than its factorization.

989649722799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5829 (or 5823 counting only the distinct ones).

The product of its digits is 2222131968, while the sum is 81.

The spelling of 989649722799 in words is "nine hundred eighty-nine billion, six hundred forty-nine million, seven hundred twenty-two thousand, seven hundred ninety-nine".