9973444021776 has 135 divisors (see below), whose sum is σ = 28238480363431. Its totient is φ = 3286015974912.

The previous prime is 9973444021757. The next prime is 9973444021787. The reversal of 9973444021776 is 6771204443799.

The square root of 9973444021776 is 3158076.

It is a perfect power (a square), and thus also a powerful number.

9973444021776 is a `hidden beast` number, since 9 + 9 + 7 + 344 + 4 + 0 + 217 + 76 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3859574576400 + 6113869445376 = 1964580^2 + 2472624^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3372823690 + ... + 3372826646.

Almost surely, 2^{9973444021776} is an apocalyptic number.

9973444021776 is the 3158076-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9973444021776

9973444021776 is an abundant number, since it is smaller than the sum of its proper divisors (18265036341655).

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

9973444021776 is an frugal number, since it uses more digits than its factorization.

9973444021776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106 (or 3051 counting only the distinct ones).

The product of its (nonzero) digits is 64012032, while the sum is 63.

The spelling of 9973444021776 in words is "nine trillion, nine hundred seventy-three billion, four hundred forty-four million, twenty-one thousand, seven hundred seventy-six".