10644812321 has 16 divisors (see below), whose sum is σ = 13049527680. Its totient is φ = 8544328320.

The previous prime is 10644812287. The next prime is 10644812323. The reversal of 10644812321 is 12321844601.

It is not a de Polignac number, because 10644812321 - 2¹⁰ = 10644811297 is a prime.

It is a super-2 number, since 2×10644812321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10644812323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614956 + ... + 1621533.

It is an arithmetic number, because the mean of its divisors is an integer number (815595480).

Almost surely, 2^10644812321 is an apocalyptic number.

10644812321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10644812321 is a deficient number, since it is larger than the sum of its proper divisors (2404715359).

10644812321 is a wasteful number, since it uses less digits than its factorization.

10644812321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236536.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 10644812321 in words is "ten billion, six hundred forty-four million, eight hundred twelve thousand, three hundred twenty-one".