219805793545 has 8 divisors (see below), whose sum is σ = 284056717896. Its totient is φ = 162318124416.

The previous prime is 219805793531. The next prime is 219805793617. The reversal of 219805793545 is 545397508912.

219805793545 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 42667024 + 219763126521 = 6532^2 + 468789^2 .

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 219805793545 - 2¹⁷ = 219805662473 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 219805793545.

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 7 ways as a sum of consecutive naturals, for example, 1690813732 + ... + 1690813861.

It is an arithmetic number, because the mean of its divisors is an integer number (35507089737).

Almost surely, 2^219805793545 is an apocalyptic number.

It is an amenable number.

219805793545 is a deficient number, since it is larger than the sum of its proper divisors (64250924351).

219805793545 is a wasteful number, since it uses less digits than its factorization.

219805793545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381627611.

The product of its (nonzero) digits is 13608000, while the sum is 58.

The spelling of 219805793545 in words is "two hundred nineteen billion, eight hundred five million, seven hundred ninety-three thousand, five hundred forty-five".