13643673545 has 8 divisors (see below), whose sum is σ = 16467047496. Its totient is φ = 10851846016.

The previous prime is 13643673541. The next prime is 13643673557. The reversal of 13643673545 is 54537634631.

It can be written as a sum of positive squares in 4 ways, for example, as 4815943609 + 8827729936 = 69397^2 + 93956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13643673545 - 2² = 13643673541 is a prime.

It is a super-2 number, since 2×13643673545² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13643673545.

It is not an unprimeable number, because it can be changed into a prime (13643673541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7885652 + ... + 7887381.

It is an arithmetic number, because the mean of its divisors is an integer number (2058380937).

Almost surely, 2^13643673545 is an apocalyptic number.

It is an amenable number.

13643673545 is a deficient number, since it is larger than the sum of its proper divisors (2823373951).

13643673545 is a wasteful number, since it uses less digits than its factorization.

13643673545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15773211.

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

The spelling of 13643673545 in words is "thirteen billion, six hundred forty-three million, six hundred seventy-three thousand, five hundred forty-five".