326564511197 has 4 divisors (see below), whose sum is σ = 331918027836. Its totient is φ = 321210994560.

The previous prime is 326564511187. The next prime is 326564511209. The reversal of 326564511197 is 791115465623.

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 137247279961 + 189317231236 = 370469^2 + 435106^2 .

It is a cyclic number.

It is not a de Polignac number, because 326564511197 - 2²⁸ = 326296075741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326564511137) 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, 2676758228 + ... + 2676758349.

It is an arithmetic number, because the mean of its divisors is an integer number (82979506959).

Almost surely, 2^326564511197 is an apocalyptic number.

It is an amenable number.

326564511197 is a deficient number, since it is larger than the sum of its proper divisors (5353516639).

326564511197 is an equidigital number, since it uses as much as digits as its factorization.

326564511197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353516638.

The product of its digits is 1360800, while the sum is 50.

The spelling of 326564511197 in words is "three hundred twenty-six billion, five hundred sixty-four million, five hundred eleven thousand, one hundred ninety-seven".