650528217864 has 576 divisors, whose sum is σ = 2191048704000. Its totient is φ = 170693961984.

The previous prime is 650528217863. The next prime is 650528217893. The reversal of 650528217864 is 468712825056.

650528217864 is a `hidden beast` number, since 6 + 50 + 528 + 2 + 1 + 7 + 8 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 650528217864.

It is not an unprimeable number, because it can be changed into a prime (650528217863) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1086023437 + ... + 1086024035.

It is an arithmetic number, because the mean of its divisors is an integer number (3803904000).

Almost surely, 2^650528217864 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 650528217864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095524352000).

650528217864 is an abundant number, since it is smaller than the sum of its proper divisors (1540520486136).

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

650528217864 is a wasteful number, since it uses less digits than its factorization.

650528217864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 650528217864 in words is "six hundred fifty billion, five hundred twenty-eight million, two hundred seventeen thousand, eight hundred sixty-four".