326421405635503 has 4 divisors (see below), whose sum is σ = 326430864144288. Its totient is φ = 326411947126720.

The previous prime is 326421405635497. The next prime is 326421405635621. The reversal of 326421405635503 is 305536504124623.

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

It is a cyclic number.

It is not a de Polignac number, because 326421405635503 - 2⁵ = 326421405635471 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 (326421105635503) 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, 4729202626 + ... + 4729271647.

It is an arithmetic number, because the mean of its divisors is an integer number (81607716036072).

Almost surely, 2^{326421405635503} is an apocalyptic number.

326421405635503 is a deficient number, since it is larger than the sum of its proper divisors (9458508785).

326421405635503 is an equidigital number, since it uses as much as digits as its factorization.

326421405635503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9458508784.

The product of its (nonzero) digits is 7776000, while the sum is 49.

The spelling of 326421405635503 in words is "three hundred twenty-six trillion, four hundred twenty-one billion, four hundred five million, six hundred thirty-five thousand, five hundred three".