648624560 has 40 divisors (see below), whose sum is σ = 1519950336. Its totient is φ = 257402880.

The previous prime is 648624533. The next prime is 648624601. The reversal of 648624560 is 65426846.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21761 + ... + 42080.

Almost surely, 2^648624560 is an apocalyptic number.

It is an amenable number.

648624560 is an abundant number, since it is smaller than the sum of its proper divisors (871325776).

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

648624560 is a wasteful number, since it uses less digits than its factorization.

648624560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63981 (or 63975 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 648624560 is about 25468.1086851772. The cubic root of 648624560 is about 865.6276687741.

The spelling of 648624560 in words is "six hundred forty-eight million, six hundred twenty-four thousand, five hundred sixty".