13016806561 has 8 divisors (see below), whose sum is σ = 14206994784. Its totient is φ = 11827758720.

The previous prime is 13016806559. The next prime is 13016806591. The reversal of 13016806561 is 16560861031.

13016806561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13016806561 - 2¹ = 13016806559 is a prime.

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 13016806561.

It is not an unprimeable number, because it can be changed into a prime (13016806591) 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 7 ways as a sum of consecutive naturals, for example, 261136 + ... + 306961.

It is an arithmetic number, because the mean of its divisors is an integer number (1775874348).

Almost surely, 2^13016806561 is an apocalyptic number.

13016806561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13016806561 is a deficient number, since it is larger than the sum of its proper divisors (1190188223).

13016806561 is a wasteful number, since it uses less digits than its factorization.

13016806561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570191.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 13016806561 in words is "thirteen billion, sixteen million, eight hundred six thousand, five hundred sixty-one".