13605745545 has 24 divisors (see below), whose sum is σ = 26952334656. Its totient is φ = 6219769248.

The previous prime is 13605745537. The next prime is 13605745547. The reversal of 13605745545 is 54554750631.

13605745545 is a `hidden beast` number, since 1 + 3 + 60 + 5 + 7 + 45 + 545 = 666.

It is not a de Polignac number, because 13605745545 - 2³ = 13605745537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13605745545.

It is not an unprimeable number, because it can be changed into a prime (13605745547) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 21596107 + ... + 21596736.

It is an arithmetic number, because the mean of its divisors is an integer number (1123013944).

Almost surely, 2^13605745545 is an apocalyptic number.

13605745545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13605745545 is a deficient number, since it is larger than the sum of its proper divisors (13346589111).

13605745545 is a wasteful number, since it uses less digits than its factorization.

13605745545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43192861 (or 43192858 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 45.

The spelling of 13605745545 in words is "thirteen billion, six hundred five million, seven hundred forty-five thousand, five hundred forty-five".