13355847865 has 4 divisors (see below), whose sum is σ = 16027017444. Its totient is φ = 10684678288.

The previous prime is 13355847863. The next prime is 13355847907. The reversal of 13355847865 is 56874855331.

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 1723578256 + 11632269609 = 41516^2 + 107853^2 .

It is a cyclic number.

It is not a de Polignac number, because 13355847865 - 2¹ = 13355847863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13355847863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335584782 + ... + 1335584791.

It is an arithmetic number, because the mean of its divisors is an integer number (4006754361).

Almost surely, 2^13355847865 is an apocalyptic number.

It is an amenable number.

13355847865 is a deficient number, since it is larger than the sum of its proper divisors (2671169579).

13355847865 is an equidigital number, since it uses as much as digits as its factorization.

13355847865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671169578.

The product of its digits is 12096000, while the sum is 55.

The spelling of 13355847865 in words is "thirteen billion, three hundred fifty-five million, eight hundred forty-seven thousand, eight hundred sixty-five".