6448655 has 4 divisors (see below), whose sum is σ = 7738392. Its totient is φ = 5158920.

The previous prime is 6448639. The next prime is 6448681. The reversal of 6448655 is 5568446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6448655 - 2⁴ = 6448639 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 644861 + ... + 644870.

It is an arithmetic number, because the mean of its divisors is an integer number (1934598).

Almost surely, 2^6448655 is an apocalyptic number.

6448655 is a deficient number, since it is larger than the sum of its proper divisors (1289737).

6448655 is a wasteful number, since it uses less digits than its factorization.

6448655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289736.

The product of its digits is 115200, while the sum is 38.

The square root of 6448655 is about 2539.4202094179. The cubic root of 6448655 is about 186.1328587904.

The spelling of 6448655 in words is "six million, four hundred forty-eight thousand, six hundred fifty-five".