648663105888 has 144 divisors (see below), whose sum is σ = 2142715419936. Its totient is φ = 182294046720.

The previous prime is 648663105757. The next prime is 648663105941. The reversal of 648663105888 is 888501366846.

648663105888 is a `hidden beast` number, since 6 + 48 + 6 + 6 + 3 + 1 + 0 + 588 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2514381 + ... + 2760332.

It is an arithmetic number, because the mean of its divisors is an integer number (14879968194).

Almost surely, 2^648663105888 is an apocalyptic number.

It is an amenable number.

648663105888 is an abundant number, since it is smaller than the sum of its proper divisors (1494052314048).

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

648663105888 is a wasteful number, since it uses less digits than its factorization.

648663105888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274797 (or 5274786 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 63.

The spelling of 648663105888 in words is "six hundred forty-eight billion, six hundred sixty-three million, one hundred five thousand, eight hundred eighty-eight".