13544450145 has 24 divisors (see below), whose sum is σ = 24286602600. Its totient is φ = 6974612736.

The previous prime is 13544450141. The next prime is 13544450189. The reversal of 13544450145 is 54105444531.

13544450145 is a `hidden beast` number, since 13 + 54 + 4 + 450 + 145 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 817902801 + 12726547344 = 28599^2 + 112812^2 .

It is not a de Polignac number, because 13544450145 - 2² = 13544450141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13544450141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5188140 + ... + 5190749.

It is an arithmetic number, because the mean of its divisors is an integer number (1011941775).

Almost surely, 2^13544450145 is an apocalyptic number.

13544450145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13544450145 is a deficient number, since it is larger than the sum of its proper divisors (10742152455).

13544450145 is a wasteful number, since it uses less digits than its factorization.

13544450145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378929 (or 10378926 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 13544450145 its reverse (54105444531), we get a palindrome (67649894676).

The spelling of 13544450145 in words is "thirteen billion, five hundred forty-four million, four hundred fifty thousand, one hundred forty-five".