989649722808 has 48 divisors (see below), whose sum is σ = 2706323695920. Its totient is φ = 326680488576.

The previous prime is 989649722801. The next prime is 989649722813. The reversal of 989649722808 is 808227946989.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989649722801) 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 11 ways as a sum of consecutive naturals, for example, 66716541 + ... + 66731372.

It is an arithmetic number, because the mean of its divisors is an integer number (56381743665).

Almost surely, 2^989649722808 is an apocalyptic number.

It is an amenable number.

989649722808 is an abundant number, since it is smaller than the sum of its proper divisors (1716673973112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

989649722808 is a wasteful number, since it uses less digits than its factorization.

989649722808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133448028 (or 133448021 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 72.

The spelling of 989649722808 in words is "nine hundred eighty-nine billion, six hundred forty-nine million, seven hundred twenty-two thousand, eight hundred eight".