648203775 has 24 divisors (see below), whose sum is σ = 1075545744. Its totient is φ = 344467200.

The previous prime is 648203771. The next prime is 648203797. The reversal of 648203775 is 577302846.

It is not a de Polignac number, because 648203775 - 2² = 648203771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648203771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5697 + ... + 36453.

It is an arithmetic number, because the mean of its divisors is an integer number (44814406).

Almost surely, 2^648203775 is an apocalyptic number.

648203775 is a deficient number, since it is larger than the sum of its proper divisors (427341969).

648203775 is a wasteful number, since it uses less digits than its factorization.

648203775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31051 (or 31046 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 648203775 is about 25459.8463271089. The cubic root of 648203775 is about 865.4404408279.

The spelling of 648203775 in words is "six hundred forty-eight million, two hundred three thousand, seven hundred seventy-five".