13219567805 has 6 divisors (see below), whose sum is σ = 15863789886. Its totient is φ = 10575448568.

The previous prime is 13219567769. The next prime is 13219567817. The reversal of 13219567805 is 50876591231.

It can be written as a sum of positive squares in only one way, i.e., 10575654244 + 2643913561 = 102838^2 + 51419^2 .

It is not a de Polignac number, because 13219567805 - 2¹⁰ = 13219566781 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 13219567805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231386 + ... + 282804.

It is an arithmetic number, because the mean of its divisors is an integer number (2643964981).

Almost surely, 2^13219567805 is an apocalyptic number.

It is an amenable number.

13219567805 is a deficient number, since it is larger than the sum of its proper divisors (2644222081).

13219567805 is an frugal number, since it uses more digits than its factorization.

13219567805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102843 (or 51424 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 13219567805 in words is "thirteen billion, two hundred nineteen million, five hundred sixty-seven thousand, eight hundred five".