6499645 has 8 divisors (see below), whose sum is σ = 7832160. Its totient is φ = 5178000.

The previous prime is 6499637. The next prime is 6499651. The reversal of 6499645 is 5469946.

It is a happy number.

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

It is not a de Polignac number, because 6499645 - 2³ = 6499637 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1335 + ... + 3844.

It is an arithmetic number, because the mean of its divisors is an integer number (979020).

Almost surely, 2^6499645 is an apocalyptic number.

It is an amenable number.

6499645 is a deficient number, since it is larger than the sum of its proper divisors (1332515).

6499645 is a wasteful number, since it uses less digits than its factorization.

6499645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435.

The product of its digits is 233280, while the sum is 43.

The square root of 6499645 is about 2549.4401346178. The cubic root of 6499645 is about 186.6221602368.

The spelling of 6499645 in words is "six million, four hundred ninety-nine thousand, six hundred forty-five".