13181735645 has 8 divisors (see below), whose sum is σ = 17034858456. Its totient is φ = 9734204736.

The previous prime is 13181735617. The next prime is 13181735657. The reversal of 13181735645 is 54653718131.

It is a happy number.

13181735645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 340993156 + 12840742489 = 18466^2 + 113317^2 .

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 13181735645 - 2⁸ = 13181735389 is a prime.

It is a super-2 number, since 2×13181735645² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13181735596 and 13181735605.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 101397902 + ... + 101398031.

It is an arithmetic number, because the mean of its divisors is an integer number (2129357307).

Almost surely, 2^13181735645 is an apocalyptic number.

It is an amenable number.

13181735645 is a deficient number, since it is larger than the sum of its proper divisors (3853122811).

13181735645 is a wasteful number, since it uses less digits than its factorization.

13181735645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202795951.

The product of its digits is 302400, while the sum is 44.

The spelling of 13181735645 in words is "thirteen billion, one hundred eighty-one million, seven hundred thirty-five thousand, six hundred forty-five".