989244099781 has 8 divisors (see below), whose sum is σ = 1137765735680. Its totient is φ = 842522726448.

The previous prime is 989244099763. The next prime is 989244099821. The reversal of 989244099781 is 187990442989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989244099781 - 2⁷ = 989244099653 is a prime.

It is a super-2 number, since 2×989244099781² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 989244099781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989244099731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450064461 + ... + 450066658.

It is an arithmetic number, because the mean of its divisors is an integer number (142220716960).

Almost surely, 2^989244099781 is an apocalyptic number.

It is an amenable number.

989244099781 is a deficient number, since it is larger than the sum of its proper divisors (148521635899).

989244099781 is a wasteful number, since it uses less digits than its factorization.

989244099781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900131283.

The product of its (nonzero) digits is 94058496, while the sum is 70.

The spelling of 989244099781 in words is "nine hundred eighty-nine billion, two hundred forty-four million, ninety-nine thousand, seven hundred eighty-one".