648332550 has 72 divisors (see below), whose sum is σ = 1747798104. Its totient is φ = 172298880.

The previous prime is 648332513. The next prime is 648332569. The reversal of 648332550 is 55233846.

It is a happy number.

648332550 is a `hidden beast` number, since 648 + 3 + 3 + 2 + 5 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 138549 + ... + 143151.

Almost surely, 2^648332550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648332550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873899052).

648332550 is an abundant number, since it is smaller than the sum of its proper divisors (1099465554).

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

648332550 is a wasteful number, since it uses less digits than its factorization.

648332550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934 (or 4926 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 648332550 is about 25462.3751837883. The cubic root of 648332550 is about 865.4977477622.

The spelling of 648332550 in words is "six hundred forty-eight million, three hundred thirty-two thousand, five hundred fifty".