648990975 has 24 divisors (see below), whose sum is σ = 1075672720. Its totient is φ = 345265920.

The previous prime is 648990967. The next prime is 648991001. The reversal of 648990975 is 579099846.

It is not a de Polignac number, because 648990975 - 2³ = 648990967 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 20097 + ... + 41253.

Almost surely, 2^648990975 is an apocalyptic number.

648990975 is a deficient number, since it is larger than the sum of its proper divisors (426681745).

648990975 is a wasteful number, since it uses less digits than its factorization.

648990975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21579 (or 21574 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 648990975 is about 25475.3012739791. The cubic root of 648990975 is about 865.7906388879.

The spelling of 648990975 in words is "six hundred forty-eight million, nine hundred ninety thousand, nine hundred seventy-five".