645464586 has 16 divisors (see below), whose sum is σ = 1390231584. Its totient is φ = 198604464.

The previous prime is 645464563. The next prime is 645464591. The reversal of 645464586 is 685464546.

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 7 ways as a sum of consecutive naturals, for example, 4137516 + ... + 4137671.

It is an arithmetic number, because the mean of its divisors is an integer number (86889474).

Almost surely, 2^645464586 is an apocalyptic number.

645464586 is an abundant number, since it is smaller than the sum of its proper divisors (744766998).

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

645464586 is a wasteful number, since it uses less digits than its factorization.

645464586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275205.

The product of its digits is 2764800, while the sum is 48.

The square root of 645464586 is about 25405.9950799019. The cubic root of 645464586 is about 864.2196559788.

The spelling of 645464586 in words is "six hundred forty-five million, four hundred sixty-four thousand, five hundred eighty-six".