13320510644 has 96 divisors (see below), whose sum is σ = 27764889600. Its totient is φ = 5588352000.

The previous prime is 13320510641. The next prime is 13320510689. The reversal of 13320510644 is 44601502331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320510641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13440989 + ... + 13441979.

It is an arithmetic number, because the mean of its divisors is an integer number (289217600).

Almost surely, 2^13320510644 is an apocalyptic number.

13320510644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13320510644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13882444800).

13320510644 is an abundant number, since it is smaller than the sum of its proper divisors (14444378956).

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

13320510644 is a wasteful number, since it uses less digits than its factorization.

13320510644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 13320510644 in words is "thirteen billion, three hundred twenty million, five hundred ten thousand, six hundred forty-four".