6643452573 has 24 divisors (see below), whose sum is σ = 9955335936. Its totient is φ = 4427265600.

The previous prime is 6643452547. The next prime is 6643452653. The reversal of 6643452573 is 3752543466.

It is not a de Polignac number, because 6643452573 - 2⁶ = 6643452509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643452523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1144308 + ... + 1150098.

It is an arithmetic number, because the mean of its divisors is an integer number (414805664).

Almost surely, 2^6643452573 is an apocalyptic number.

It is an amenable number.

6643452573 is a deficient number, since it is larger than the sum of its proper divisors (3311883363).

6643452573 is an equidigital number, since it uses as much as digits as its factorization.

6643452573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10527 (or 10515 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 45.

The square root of 6643452573 is about 81507.3774145629. The cubic root of 6643452573 is about 1879.8849873997.

The spelling of 6643452573 in words is "six billion, six hundred forty-three million, four hundred fifty-two thousand, five hundred seventy-three".