10644663444540 has 48 divisors (see below), whose sum is σ = 29862046370688. Its totient is φ = 2833149420864.

The previous prime is 10644663444523. The next prime is 10644663444647. The reversal of 10644663444540 is 4544436644601.

It is a happy number.

It is a super-2 number, since 2×10644663444540² (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, 169577662 + ... + 169640421.

It is an arithmetic number, because the mean of its divisors is an integer number (622125966056).

Almost surely, 2^{10644663444540} is an apocalyptic number.

10644663444540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10644663444540 is an abundant number, since it is smaller than the sum of its proper divisors (19217382926148).

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

10644663444540 is a wasteful number, since it uses less digits than its factorization.

10644663444540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339218618 (or 339218616 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 51.

The spelling of 10644663444540 in words is "ten trillion, six hundred forty-four billion, six hundred sixty-three million, four hundred forty-four thousand, five hundred forty".