9726891322644 has 48 divisors (see below), whose sum is σ = 25276376643840. Its totient is φ = 3234774360960.

The previous prime is 9726891322627. The next prime is 9726891322657. The reversal of 9726891322644 is 4462231986279.

9726891322644 is a `hidden beast` number, since 9 + 7 + 268 + 9 + 1 + 322 + 6 + 44 = 666.

It is a super-2 number, since 2×9726891322644² (a number of 27 digits) contains 22 as substring.

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, 104435829 + ... + 104528924.

It is an arithmetic number, because the mean of its divisors is an integer number (526591180080).

Almost surely, 2^{9726891322644} is an apocalyptic number.

It is an amenable number.

9726891322644 is an abundant number, since it is smaller than the sum of its proper divisors (15549485321196).

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

9726891322644 is a wasteful number, since it uses less digits than its factorization.

9726891322644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208965197 (or 208965189 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 9726891322644 in words is "nine trillion, seven hundred twenty-six billion, eight hundred ninety-one million, three hundred twenty-two thousand, six hundred forty-four".