650861568 has 440 divisors, whose sum is σ = 2377795200. Its totient is φ = 173187072.

The previous prime is 650861551. The next prime is 650861569. The reversal of 650861568 is 865168056.

650861568 is a `hidden beast` number, since 6 + 5 + 0 + 86 + 1 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650861569) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11031523 + ... + 11031581.

It is an arithmetic number, because the mean of its divisors is an integer number (5404080).

Almost surely, 2^650861568 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 650861568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188897600).

650861568 is an abundant number, since it is smaller than the sum of its proper divisors (1726933632).

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

650861568 is a wasteful number, since it uses less digits than its factorization.

650861568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 650861568 is about 25511.9887111922. The cubic root of 650861568 is about 866.6216665655.

The spelling of 650861568 in words is "six hundred fifty million, eight hundred sixty-one thousand, five hundred sixty-eight".