13506502645 has 8 divisors (see below), whose sum is σ = 16270870104. Its totient is φ = 10763157504.

The previous prime is 13506502553. The next prime is 13506502661. The reversal of 13506502645 is 54620560531.

It can be written as a sum of positive squares in 4 ways, for example, as 3285697041 + 10220805604 = 57321^2 + 101098^2 .

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 13506502645 - 2⁹ = 13506502133 is a prime.

It is a super-2 number, since 2×13506502645² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5254164 + ... + 5256733.

It is an arithmetic number, because the mean of its divisors is an integer number (2033858763).

Almost surely, 2^13506502645 is an apocalyptic number.

It is an amenable number.

13506502645 is a deficient number, since it is larger than the sum of its proper divisors (2764367459).

13506502645 is a wasteful number, since it uses less digits than its factorization.

13506502645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511159.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 13506502645 in words is "thirteen billion, five hundred six million, five hundred two thousand, six hundred forty-five".