641311453 has 4 divisors (see below), whose sum is σ = 641388960. Its totient is φ = 641233948.

The previous prime is 641311441. The next prime is 641311457. The reversal of 641311453 is 354113146.

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 not a de Polignac number, because 641311453 - 2²⁹ = 104440541 is a prime.

It is a super-2 number, since 2×641311453² = 822560759497942418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641311457) 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, 24625 + ... + 43462.

It is an arithmetic number, because the mean of its divisors is an integer number (160347240).

Almost surely, 2^641311453 is an apocalyptic number.

It is an amenable number.

641311453 is a deficient number, since it is larger than the sum of its proper divisors (77507).

641311453 is an equidigital number, since it uses as much as digits as its factorization.

641311453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77506.

The product of its digits is 4320, while the sum is 28.

The square root of 641311453 is about 25324.1278823181. The cubic root of 641311453 is about 862.3621077043.

Adding to 641311453 its reverse (354113146), we get a palindrome (995424599).

The spelling of 641311453 in words is "six hundred forty-one million, three hundred eleven thousand, four hundred fifty-three".