326385218057 has 4 divisors (see below), whose sum is σ = 326411959056. Its totient is φ = 326358477060.

The previous prime is 326385218009. The next prime is 326385218059. The reversal of 326385218057 is 750812583623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326385218057 is a prime.

It is a super-2 number, since 2×326385218057² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 326385217996 and 326385218014.

It is not an unprimeable number, because it can be changed into a prime (326385218059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13352183 + ... + 13376604.

It is an arithmetic number, because the mean of its divisors is an integer number (81602989764).

Almost surely, 2^326385218057 is an apocalyptic number.

It is an amenable number.

326385218057 is a deficient number, since it is larger than the sum of its proper divisors (26740999).

326385218057 is a wasteful number, since it uses less digits than its factorization.

326385218057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26740998.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 326385218057 in words is "three hundred twenty-six billion, three hundred eighty-five million, two hundred eighteen thousand, fifty-seven".