6445653 has 8 divisors (see below), whose sum is σ = 8618400. Its totient is φ = 4285008.

The previous prime is 6445639. The next prime is 6445661. The reversal of 6445653 is 3565446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6445653 - 2¹² = 6441557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1698 + ... + 3971.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^6445653 is an apocalyptic number.

It is an amenable number.

6445653 is a deficient number, since it is larger than the sum of its proper divisors (2172747).

6445653 is a wasteful number, since it uses less digits than its factorization.

6445653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051.

The product of its digits is 43200, while the sum is 33.

The square root of 6445653 is about 2538.8290608074. The cubic root of 6445653 is about 186.1039712383.

The spelling of 6445653 in words is "six million, four hundred forty-five thousand, six hundred fifty-three".