6544986 has 16 divisors (see below), whose sum is σ = 14960064. Its totient is φ = 1869984.

The previous prime is 6544943. The next prime is 6545003. The reversal of 6544986 is 6894456.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 155833 = 6544986 / (6 + 5 + 4 + 4 + 9 + 8 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77875 + ... + 77958.

It is an arithmetic number, because the mean of its divisors is an integer number (935004).

Almost surely, 2^6544986 is an apocalyptic number.

6544986 is an abundant number, since it is smaller than the sum of its proper divisors (8415078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6544986 is a wasteful number, since it uses less digits than its factorization.

6544986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155845.

The product of its digits is 207360, while the sum is 42.

The square root of 6544986 is about 2558.3170249209. The cubic root of 6544986 is about 187.0551087734.

The spelling of 6544986 in words is "six million, five hundred forty-four thousand, nine hundred eighty-six".