648242560 has 128 divisors (see below), whose sum is σ = 1807848000. Its totient is φ = 222179328.

The previous prime is 648242537. The next prime is 648242563. The reversal of 648242560 is 65242846.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648242563) 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, 218044 + ... + 220996.

Almost surely, 2^648242560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648242560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903924000).

648242560 is an abundant number, since it is smaller than the sum of its proper divisors (1159605440).

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

648242560 is an equidigital number, since it uses as much as digits as its factorization.

648242560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993 (or 2967 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 648242560 is about 25460.6080053089. The cubic root of 648242560 is about 865.4577015718.

The spelling of 648242560 in words is "six hundred forty-eight million, two hundred forty-two thousand, five hundred sixty".