326091801601 has 4 divisors (see below), whose sum is σ = 327747090132. Its totient is φ = 324436513072.

The previous prime is 326091801589. The next prime is 326091801631. The reversal of 326091801601 is 106108190623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178655000976 + 147436800625 = 422676^2 + 383975^2 .

It is a cyclic number.

It is not a de Polignac number, because 326091801601 - 2⁹ = 326091801089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326091801631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827643970 + ... + 827644363.

It is an arithmetic number, because the mean of its divisors is an integer number (81936772533).

Almost surely, 2^326091801601 is an apocalyptic number.

It is an amenable number.

326091801601 is a deficient number, since it is larger than the sum of its proper divisors (1655288531).

326091801601 is a wasteful number, since it uses less digits than its factorization.

326091801601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655288530.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 326091801601 in words is "three hundred twenty-six billion, ninety-one million, eight hundred one thousand, six hundred one".