989477789368320 has 2304 divisors, whose sum is σ = 4166961374822400. Its totient is φ = 218000082862080.

The previous prime is 989477789368319. The next prime is 989477789368391. The reversal of 989477789368320 is 23863987774989.

It is a happy number.

989477789368320 is a `hidden beast` number, since 9 + 8 + 9 + 4 + 77 + 78 + 93 + 68 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

It is a Harshad number since it is a multiple of its sum of digits (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1685652111067 + ... + 1685652111653.

It is an arithmetic number, because the mean of its divisors is an integer number (1808576985600).

Almost surely, 2^{989477789368320} is an apocalyptic number.

989477789368320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989477789368320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083480687411200).

989477789368320 is an abundant number, since it is smaller than the sum of its proper divisors (3177483585454080).

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

989477789368320 is an equidigital number, since it uses as much as digits as its factorization.

989477789368320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 55306395648, while the sum is 90.

The spelling of 989477789368320 in words is "nine hundred eighty-nine trillion, four hundred seventy-seven billion, seven hundred eighty-nine million, three hundred sixty-eight thousand, three hundred twenty".