21556616150 has 48 divisors (see below), whose sum is σ = 40804136880. Its totient is φ = 8470569600.

The previous prime is 21556616149. The next prime is 21556616153. The reversal of 21556616150 is 5161665512.

It is a happy number.

21556616150 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21556616153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2670821 + ... + 2678879.

It is an arithmetic number, because the mean of its divisors is an integer number (850086185).

Almost surely, 2^21556616150 is an apocalyptic number.

21556616150 is a deficient number, since it is larger than the sum of its proper divisors (19247520730).

21556616150 is a wasteful number, since it uses less digits than its factorization.

21556616150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009 (or 9004 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 21556616150 in words is "twenty-one billion, five hundred fifty-six million, six hundred sixteen thousand, one hundred fifty".