648755568 has 60 divisors (see below), whose sum is σ = 1882870808. Its totient is φ = 216250560.

The previous prime is 648755567. The next prime is 648755579. The reversal of 648755568 is 865557846.

648755568 is a `hidden beast` number, since 6 + 4 + 8 + 75 + 5 + 568 = 666.

648755568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×648755568² = 841767574022005248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648755567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79543 + ... + 87318.

Almost surely, 2^648755568 is an apocalyptic number.

It is an amenable number.

648755568 is an abundant number, since it is smaller than the sum of its proper divisors (1234115240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648755568 is a wasteful number, since it uses less digits than its factorization.

648755568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166884 (or 166866 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The square root of 648755568 is about 25470.6805562788. The cubic root of 648755568 is about 865.6859441476.

The spelling of 648755568 in words is "six hundred forty-eight million, seven hundred fifty-five thousand, five hundred sixty-eight".