13379581644 has 96 divisors (see below), whose sum is σ = 37278447360. Its totient is φ = 3681158400.

The previous prime is 13379581613. The next prime is 13379581681. The reversal of 13379581644 is 44618597331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40767 + ... + 168585.

It is an arithmetic number, because the mean of its divisors is an integer number (388317160).

Almost surely, 2^13379581644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13379581644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18639223680).

13379581644 is an abundant number, since it is smaller than the sum of its proper divisors (23898865716).

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

13379581644 is a wasteful number, since it uses less digits than its factorization.

13379581644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127911 (or 127909 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 13379581644 in words is "thirteen billion, three hundred seventy-nine million, five hundred eighty-one thousand, six hundred forty-four".