13500331444 has 6 divisors (see below), whose sum is σ = 23625580034. Its totient is φ = 6750165720.

The previous prime is 13500331441. The next prime is 13500331463. The reversal of 13500331444 is 44413300531.

It can be written as a sum of positive squares in only one way, i.e., 13250312100 + 250019344 = 115110^2 + 15812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500331441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1687541427 + ... + 1687541434.

Almost surely, 2^13500331444 is an apocalyptic number.

It is an amenable number.

13500331444 is a deficient number, since it is larger than the sum of its proper divisors (10125248590).

13500331444 is a wasteful number, since it uses less digits than its factorization.

13500331444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375082865 (or 3375082863 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 13500331444 its reverse (44413300531), we get a palindrome (57913631975).

The spelling of 13500331444 in words is "thirteen billion, five hundred million, three hundred thirty-one thousand, four hundred forty-four".