650016638 has 16 divisors (see below), whose sum is σ = 1050213120. Its totient is φ = 300741336.

The previous prime is 650016613. The next prime is 650016667. The reversal of 650016638 is 836610056.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 650016598 and 650016607.

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, 197270 + ... + 200537.

It is an arithmetic number, because the mean of its divisors is an integer number (65638320).

Almost surely, 2^650016638 is an apocalyptic number.

650016638 is a deficient number, since it is larger than the sum of its proper divisors (400196482).

650016638 is a wasteful number, since it uses less digits than its factorization.

650016638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397871.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 650016638 is about 25495.4238639015. The cubic root of 650016638 is about 866.2464962964.

The spelling of 650016638 in words is "six hundred fifty million, sixteen thousand, six hundred thirty-eight".