328106272609 has 4 divisors (see below), whose sum is σ = 347406641604. Its totient is φ = 308805903616.

The previous prime is 328106272493. The next prime is 328106272633. The reversal of 328106272609 is 906272601823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906272601823 = 23 ⋅39403156601.

It can be written as a sum of positive squares in 2 ways, for example, as 215430581025 + 112675691584 = 464145^2 + 335672^2 .

It is a cyclic number.

It is not a de Polignac number, because 328106272609 - 2¹¹ = 328106270561 is a prime.

It is a super-2 number, since 2×328106272609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328106272699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9650184472 + ... + 9650184505.

It is an arithmetic number, because the mean of its divisors is an integer number (86851660401).

Almost surely, 2^328106272609 is an apocalyptic number.

It is an amenable number.

328106272609 is a deficient number, since it is larger than the sum of its proper divisors (19300368995).

328106272609 is a wasteful number, since it uses less digits than its factorization.

328106272609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19300368994.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 328106272609 in words is "three hundred twenty-eight billion, one hundred six million, two hundred seventy-two thousand, six hundred nine".