650656644 has 96 divisors (see below), whose sum is σ = 1768919040. Its totient is φ = 184195200.

The previous prime is 650656639. The next prime is 650656649. The reversal of 650656644 is 446656056.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (650656639) and next prime (650656649).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 650656596 and 650656605.

It is not an unprimeable number, because it can be changed into a prime (650656649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115927 + ... + 121409.

It is an arithmetic number, because the mean of its divisors is an integer number (18426240).

Almost surely, 2^650656644 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 650656644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884459520).

650656644 is an abundant number, since it is smaller than the sum of its proper divisors (1118262396).

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

650656644 is a wasteful number, since it uses less digits than its factorization.

650656644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5559 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 650656644 is about 25507.9721655799. The cubic root of 650656644 is about 866.5307049701.

The spelling of 650656644 in words is "six hundred fifty million, six hundred fifty-six thousand, six hundred forty-four".