648642016 has 48 divisors (see below), whose sum is σ = 1438069248. Its totient is φ = 285321600.

The previous prime is 648641999. The next prime is 648642031. The reversal of 648642016 is 610246846.

It is a congruent number.

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, 18810 + ... + 40633.

It is an arithmetic number, because the mean of its divisors is an integer number (29959776).

Almost surely, 2^648642016 is an apocalyptic number.

It is an amenable number.

648642016 is an abundant number, since it is smaller than the sum of its proper divisors (789427232).

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

648642016 is a wasteful number, since it uses less digits than its factorization.

648642016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59495 (or 59487 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 648642016 is about 25468.4513859795. The cubic root of 648642016 is about 865.6354340577.

The spelling of 648642016 in words is "six hundred forty-eight million, six hundred forty-two thousand, sixteen".