648199844 has 12 divisors (see below), whose sum is σ = 1135000524. Its totient is φ = 323913984.

The previous prime is 648199837. The next prime is 648199859. The reversal of 648199844 is 448991846.

648199844 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 2 ways, for example, as 412577344 + 235622500 = 20312^2 + 15350^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38489 + ... + 52704.

It is an arithmetic number, because the mean of its divisors is an integer number (94583377).

Almost surely, 2^648199844 is an apocalyptic number.

It is an amenable number.

648199844 is a deficient number, since it is larger than the sum of its proper divisors (486800680).

648199844 is a wasteful number, since it uses less digits than its factorization.

648199844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92974 (or 92972 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 648199844 is about 25459.7691269972. The cubic root of 648199844 is about 865.4386913507.

The spelling of 648199844 in words is "six hundred forty-eight million, one hundred ninety-nine thousand, eight hundred forty-four".