9815773056 has 128 divisors (see below), whose sum is σ = 26748839040. Its totient is φ = 3187537920.

The previous prime is 9815773039. The next prime is 9815773061. The reversal of 9815773056 is 6503775189.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12102891 + ... + 12103701.

It is an arithmetic number, because the mean of its divisors is an integer number (208975305).

Almost surely, 2^9815773056 is an apocalyptic number.

9815773056 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 9815773056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13374419520).

9815773056 is an abundant number, since it is smaller than the sum of its proper divisors (16933065984).

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

9815773056 is a wasteful number, since it uses less digits than its factorization.

9815773056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 51.

The square root of 9815773056 is about 99074.5832996536. The cubic root of 9815773056 is about 2141.1224390939.

The spelling of 9815773056 in words is "nine billion, eight hundred fifteen million, seven hundred seventy-three thousand, fifty-six".