13545643673 has 16 divisors (see below), whose sum is σ = 14774477760. Its totient is φ = 12368294400.

The previous prime is 13545643663. The next prime is 13545643691. The reversal of 13545643673 is 37634654531.

13545643673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13545643673 - 2¹² = 13545639577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13545643603) 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 15 ways as a sum of consecutive naturals, for example, 70478 + ... + 179048.

It is an arithmetic number, because the mean of its divisors is an integer number (923404860).

Almost surely, 2^13545643673 is an apocalyptic number.

It is an amenable number.

13545643673 is a deficient number, since it is larger than the sum of its proper divisors (1228834087).

13545643673 is a wasteful number, since it uses less digits than its factorization.

13545643673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108808.

The product of its digits is 2721600, while the sum is 47.

The spelling of 13545643673 in words is "thirteen billion, five hundred forty-five million, six hundred forty-three thousand, six hundred seventy-three".