219490226568 has 36 divisors (see below), whose sum is σ = 594463463685. Its totient is φ = 73162083744.

The previous prime is 219490226531. The next prime is 219490226633. The reversal of 219490226568 is 865622094912.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

219490226568 is a `hidden beast` number, since 2 + 19 + 49 + 0 + 2 + 26 + 568 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216465006564 + 3025220004 = 465258^2 + 55002^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=331278.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3947730 + ... + 4002942.

Almost surely, 2^219490226568 is an apocalyptic number.

It is an amenable number.

219490226568 is an abundant number, since it is smaller than the sum of its proper divisors (374973237117).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219490226568 is an frugal number, since it uses more digits than its factorization.

219490226568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110438 (or 55218 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 219490226568 in words is "two hundred nineteen billion, four hundred ninety million, two hundred twenty-six thousand, five hundred sixty-eight".