13540534673 has 4 divisors (see below), whose sum is σ = 13548951780. Its totient is φ = 13532117568.

The previous prime is 13540534669. The next prime is 13540534687. The reversal of 13540534673 is 37643504531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12640954624 + 899580049 = 112432^2 + 29993^2 .

It is a cyclic number.

It is not a de Polignac number, because 13540534673 - 2² = 13540534669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13540534673.

It is not an unprimeable number, because it can be changed into a prime (13540534613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4206140 + ... + 4209357.

It is an arithmetic number, because the mean of its divisors is an integer number (3387237945).

Almost surely, 2^13540534673 is an apocalyptic number.

It is an amenable number.

13540534673 is a deficient number, since it is larger than the sum of its proper divisors (8417107).

13540534673 is an equidigital number, since it uses as much as digits as its factorization.

13540534673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417106.

The product of its (nonzero) digits is 453600, while the sum is 41.

The spelling of 13540534673 in words is "thirteen billion, five hundred forty million, five hundred thirty-four thousand, six hundred seventy-three".