9644061929121 has 9 divisors (see below), whose sum is σ = 13930325132529. Its totient is φ = 6429368408436.

The previous prime is 9644061929113. The next prime is 9644061929191. The reversal of 9644061929121 is 1219291604469.

The square root of 9644061929121 is 3105489.

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

9644061929121 is a `hidden beast` number, since 9 + 6 + 4 + 4 + 0 + 619 + 2 + 9 + 12 + 1 = 666.

9644061929121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9644061929121 - 2³ = 9644061929113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9644061929111) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8798886 + ... + 9834048.

Almost surely, 2^{9644061929121} is an apocalyptic number.

9644061929121 is the 3105489-th square number.

9644061929121 is the 1552745-th centered octagonal number.

It is an amenable number.

9644061929121 is a deficient number, since it is larger than the sum of its proper divisors (4286263203408).

9644061929121 is an frugal number, since it uses more digits than its factorization.

9644061929121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070332 (or 1035166 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 9644061929121 in words is "nine trillion, six hundred forty-four billion, sixty-one million, nine hundred twenty-nine thousand, one hundred twenty-one".