10644453838891 has 8 divisors (see below), whose sum is σ = 10895694543360. Its totient is φ = 10394244924648.

The previous prime is 10644453838861. The next prime is 10644453838897. The reversal of 10644453838891 is 19883835444601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10644453838891 - 2¹⁵ = 10644453806123 is a prime.

It is a super-2 number, since 2×10644453838891² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10644453838897) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 257926681 + ... + 257967946.

It is an arithmetic number, because the mean of its divisors is an integer number (1361961817920).

Almost surely, 2^{10644453838891} is an apocalyptic number.

10644453838891 is a deficient number, since it is larger than the sum of its proper divisors (251240704469).

10644453838891 is an equidigital number, since it uses as much as digits as its factorization.

10644453838891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515895113.

The product of its (nonzero) digits is 79626240, while the sum is 64.

The spelling of 10644453838891 in words is "ten trillion, six hundred forty-four billion, four hundred fifty-three million, eight hundred thirty-eight thousand, eight hundred ninety-one".