641321456 has 20 divisors (see below), whose sum is σ = 1243607904. Its totient is φ = 320390400.

The previous prime is 641321449. The next prime is 641321477. The reversal of 641321456 is 654123146.

641321456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641321456² = 822586419851919872, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3416 + ... + 35976.

Almost surely, 2^641321456 is an apocalyptic number.

It is an amenable number.

641321456 is a deficient number, since it is larger than the sum of its proper divisors (602286448).

641321456 is a wasteful number, since it uses less digits than its factorization.

641321456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33800 (or 33794 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 641321456 is about 25324.3253809455. The cubic root of 641321456 is about 862.3665913101.

The spelling of 641321456 in words is "six hundred forty-one million, three hundred twenty-one thousand, four hundred fifty-six".