641536450 has 12 divisors (see below), whose sum is σ = 1193257890. Its totient is φ = 256614560.

The previous prime is 641536411. The next prime is 641536459. The reversal of 641536450 is 54635146.

It can be written as a sum of positive squares in 3 ways, for example, as 267616881 + 373919569 = 16359^2 + 19337^2 .

It is a super-3 number, since 3×641536450³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (641536459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6415315 + ... + 6415414.

Almost surely, 2^641536450 is an apocalyptic number.

641536450 is a deficient number, since it is larger than the sum of its proper divisors (551721440).

641536450 is a wasteful number, since it uses less digits than its factorization.

641536450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830741 (or 12830736 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 641536450 is about 25328.5698372411. The cubic root of 641536450 is about 862.4629459682.

The spelling of 641536450 in words is "six hundred forty-one million, five hundred thirty-six thousand, four hundred fifty".