648844885 has 16 divisors (see below), whose sum is σ = 858962160. Its totient is φ = 467458560.

The previous prime is 648844883. The next prime is 648844891. The reversal of 648844885 is 588448846.

It is a happy number.

648844885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 291521476 + 357323409 = 17074^2 + 18903^2 .

It is not a de Polignac number, because 648844885 - 2¹ = 648844883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648844883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119070 + ... + 124399.

It is an arithmetic number, because the mean of its divisors is an integer number (53685135).

Almost surely, 2^648844885 is an apocalyptic number.

648844885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

648844885 is a deficient number, since it is larger than the sum of its proper divisors (210117275).

648844885 is a wasteful number, since it uses less digits than its factorization.

648844885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243528.

The product of its digits is 7864320, while the sum is 55.

The square root of 648844885 is about 25472.4338256084. The cubic root of 648844885 is about 865.7256699073.

The spelling of 648844885 in words is "six hundred forty-eight million, eight hundred forty-four thousand, eight hundred eighty-five".