9219689856 has 384 divisors, whose sum is σ = 29732102400. Its totient is φ = 2724212736.

The previous prime is 9219689851. The next prime is 9219689873. The reversal of 9219689856 is 6589869129.

It is a tau number, because it is divible by the number of its divisors (384).

It is a junction number, because it is equal to n+sod(n) for n = 9219689793 and 9219689802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9219689851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66328635 + ... + 66328773.

It is an arithmetic number, because the mean of its divisors is an integer number (77427350).

Almost surely, 2^9219689856 is an apocalyptic number.

9219689856 is a gapful number since it is divisible by the number (96) 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 9219689856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14866051200).

9219689856 is an abundant number, since it is smaller than the sum of its proper divisors (20512412544).

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

9219689856 is a wasteful number, since it uses less digits than its factorization.

9219689856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 303 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 9219689856 is about 96019.2160767833. The cubic root of 9219689856 is about 2096.8728858556.

The spelling of 9219689856 in words is "nine billion, two hundred nineteen million, six hundred eighty-nine thousand, eight hundred fifty-six".