139281721344 has 576 divisors, whose sum is σ = 448819600320. Its totient is φ = 42998169600.

The previous prime is 139281721301. The next prime is 139281721349. The reversal of 139281721344 is 443127182931.

139281721344 is a `hidden beast` number, since 1 + 3 + 9 + 281 + 7 + 21 + 344 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a self number, because there is not a number n which added to its sum of digits gives 139281721344.

It is not an unprimeable number, because it can be changed into a prime (139281721349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 854489007 + ... + 854489169.

It is an arithmetic number, because the mean of its divisors is an integer number (779200695).

Almost surely, 2^139281721344 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 139281721344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224409800160).

139281721344 is an abundant number, since it is smaller than the sum of its proper divisors (309537878976).

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

139281721344 is a wasteful number, since it uses less digits than its factorization.

139281721344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 286 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 139281721344 in words is "one hundred thirty-nine billion, two hundred eighty-one million, seven hundred twenty-one thousand, three hundred forty-four".