326193561 has 20 divisors (see below), whose sum is σ = 488416500. Its totient is φ = 216953856.

The previous prime is 326193541. The next prime is 326193589. The reversal of 326193561 is 165391623.

326193561 is a `hidden beast` number, since 3 + 2 + 6 + 1 + 93 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 185913225 + 140280336 = 13635^2 + 11844^2 .

It is not a de Polignac number, because 326193561 - 2⁵ = 326193529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326193541) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31885 + ... + 40853.

It is an arithmetic number, because the mean of its divisors is an integer number (24420825).

Almost surely, 2^326193561 is an apocalyptic number.

It is an amenable number.

326193561 is a deficient number, since it is larger than the sum of its proper divisors (162222939).

326193561 is an equidigital number, since it uses as much as digits as its factorization.

326193561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430 (or 9421 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 326193561 is about 18060.8294660018. The cubic root of 326193561 is about 688.3750609865.

The spelling of 326193561 in words is "three hundred twenty-six million, one hundred ninety-three thousand, five hundred sixty-one".