641631452 has 24 divisors (see below), whose sum is σ = 1399923840. Its totient is φ = 249986160.

The previous prime is 641631449. The next prime is 641631469. The reversal of 641631452 is 254136146.

641631452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041302 + ... + 1041917.

It is an arithmetic number, because the mean of its divisors is an integer number (58330160).

Almost surely, 2^641631452 is an apocalyptic number.

It is an amenable number.

641631452 is an abundant number, since it is smaller than the sum of its proper divisors (758292388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641631452 is a wasteful number, since it uses less digits than its factorization.

641631452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083241 (or 2083239 counting only the distinct ones).

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

The square root of 641631452 is about 25330.4451599256. The cubic root of 641631452 is about 862.5055165089.

Adding to 641631452 its reverse (254136146), we get a palindrome (895767598).

The spelling of 641631452 in words is "six hundred forty-one million, six hundred thirty-one thousand, four hundred fifty-two".