9121837576644 has 135 divisors (see below), whose sum is σ = 25823717938557. Its totient is φ = 2806501797216.

The previous prime is 9121837576637. The next prime is 9121837576661. The reversal of 9121837576644 is 4466757381219.

The square root of 9121837576644 is 3020238.

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

9121837576644 is a `hidden beast` number, since 9 + 1 + 2 + 18 + 3 + 7 + 576 + 6 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1349384256900 + 7772453319744 = 1161630^2 + 2787912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 706729239 + ... + 706742145.

Almost surely, 2^{9121837576644} is an apocalyptic number.

9121837576644 is the 3020238-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121837576644

9121837576644 is an abundant number, since it is smaller than the sum of its proper divisors (16701880361913).

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

9121837576644 is an equidigital number, since it uses as much as digits as its factorization.

9121837576644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25856 (or 12925 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 9121837576644 in words is "nine trillion, one hundred twenty-one billion, eight hundred thirty-seven million, five hundred seventy-six thousand, six hundred forty-four".