16638831650 has 24 divisors (see below), whose sum is σ = 35369402880. Its totient is φ = 5704742160.

The previous prime is 16638831637. The next prime is 16638831667. The reversal of 16638831650 is 5613883661.

16638831650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16638831595 and 16638831604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23769410 + ... + 23770109.

It is an arithmetic number, because the mean of its divisors is an integer number (1473725120).

Almost surely, 2^16638831650 is an apocalyptic number.

16638831650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16638831650 is an abundant number, since it is smaller than the sum of its proper divisors (18730571230).

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

16638831650 is a wasteful number, since it uses less digits than its factorization.

16638831650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47539538 (or 47539533 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 16638831650 in words is "sixteen billion, six hundred thirty-eight million, eight hundred thirty-one thousand, six hundred fifty".