13604078644 has 24 divisors (see below), whose sum is σ = 25655774760. Its totient is φ = 6274564224.

The previous prime is 13604078597. The next prime is 13604078647. The reversal of 13604078644 is 44687040631.

13604078644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1424307600 + 12179771044 = 37740^2 + 110362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13604078644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13604078647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9979 + ... + 165250.

It is an arithmetic number, because the mean of its divisors is an integer number (1068990615).

Almost surely, 2^13604078644 is an apocalyptic number.

It is an amenable number.

13604078644 is a deficient number, since it is larger than the sum of its proper divisors (12051696116).

13604078644 is a wasteful number, since it uses less digits than its factorization.

13604078644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176739 (or 176737 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 13604078644 in words is "thirteen billion, six hundred four million, seventy-eight thousand, six hundred forty-four".