326555505555623 has 8 divisors (see below), whose sum is σ = 327382809816720. Its totient is φ = 325729090393920.

The previous prime is 326555505555613. The next prime is 326555505555647.

326555505555623 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326555505555623 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 (326555505555613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221539340 + ... + 223008497.

It is an arithmetic number, because the mean of its divisors is an integer number (40922851227090).

Almost surely, 2^{326555505555623} is an apocalyptic number.

326555505555623 is a deficient number, since it is larger than the sum of its proper divisors (827304261097).

326555505555623 is a wasteful number, since it uses less digits than its factorization.

326555505555623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444549697.

The product of its (nonzero) digits is 506250000, while the sum is 62.

The spelling of 326555505555623 in words is "three hundred twenty-six trillion, five hundred fifty-five billion, five hundred five million, five hundred fifty-five thousand, six hundred twenty-three".