13444563540 has 48 divisors (see below), whose sum is σ = 37741616640. Its totient is φ = 3575994240.

The previous prime is 13444563499. The next prime is 13444563553. The reversal of 13444563540 is 4536544431.

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, 264676 + ... + 311355.

It is an arithmetic number, because the mean of its divisors is an integer number (786283680).

Almost surely, 2^13444563540 is an apocalyptic number.

13444563540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13444563540 is an abundant number, since it is smaller than the sum of its proper divisors (24297053100).

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

13444563540 is a wasteful number, since it uses less digits than its factorization.

13444563540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576432 (or 576430 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 13444563540 in words is "thirteen billion, four hundred forty-four million, five hundred sixty-three thousand, five hundred forty".