648044859 has 16 divisors (see below), whose sum is σ = 1077269760. Its totient is φ = 336646560.

The previous prime is 648044857. The next prime is 648044869. The reversal of 648044859 is 958440846.

It is not a de Polignac number, because 648044859 - 2¹ = 648044857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648044851) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1402464 + ... + 1402925.

It is an arithmetic number, because the mean of its divisors is an integer number (67329360).

Almost surely, 2^648044859 is an apocalyptic number.

648044859 is a deficient number, since it is larger than the sum of its proper divisors (429224901).

648044859 is a wasteful number, since it uses less digits than its factorization.

648044859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805410.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 648044859 is about 25456.7252214420. The cubic root of 648044859 is about 865.3697102031.

The spelling of 648044859 in words is "six hundred forty-eight million, forty-four thousand, eight hundred fifty-nine".