326315661577 has 4 divisors (see below), whose sum is σ = 326318848020. Its totient is φ = 326312475136.

The previous prime is 326315661569. The next prime is 326315661601. The reversal of 326315661577 is 775166513623.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 775166513623 = 4463 ⋅173687321.

It can be written as a sum of positive squares in 2 ways, for example, as 281123704521 + 45191957056 = 530211^2 + 212584^2 .

It is a cyclic number.

It is not a de Polignac number, because 326315661577 - 2³ = 326315661569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326315661527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434328 + ... + 1646185.

It is an arithmetic number, because the mean of its divisors is an integer number (81579712005).

Almost surely, 2^326315661577 is an apocalyptic number.

It is an amenable number.

326315661577 is a deficient number, since it is larger than the sum of its proper divisors (3186443).

326315661577 is a wasteful number, since it uses less digits than its factorization.

326315661577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186442.

The product of its digits is 4762800, while the sum is 52.

The spelling of 326315661577 in words is "three hundred twenty-six billion, three hundred fifteen million, six hundred sixty-one thousand, five hundred seventy-seven".