326313506621 has 4 divisors (see below), whose sum is σ = 326323719744. Its totient is φ = 326303293500.

The previous prime is 326313506543. The next prime is 326313506639. The reversal of 326313506621 is 126605313623.

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-326313506621 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 (326313506021) 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, 5058485 + ... + 5122586.

It is an arithmetic number, because the mean of its divisors is an integer number (81580929936).

Almost surely, 2^326313506621 is an apocalyptic number.

It is an amenable number.

326313506621 is a deficient number, since it is larger than the sum of its proper divisors (10213123).

326313506621 is a wasteful number, since it uses less digits than its factorization.

326313506621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10213122.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 326313506621 in words is "three hundred twenty-six billion, three hundred thirteen million, five hundred six thousand, six hundred twenty-one".