21716561322 has 32 divisors (see below), whose sum is σ = 49050164160. Its totient is φ = 7120182960.

The previous prime is 21716561281. The next prime is 21716561329. The reversal of 21716561322 is 22316561712.

21716561322 is a `hidden beast` number, since 2 + 1 + 7 + 16 + 5 + 613 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (21716561329) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3293088 + ... + 3299675.

It is an arithmetic number, because the mean of its divisors is an integer number (1532817630).

Almost surely, 2^21716561322 is an apocalyptic number.

21716561322 is an abundant number, since it is smaller than the sum of its proper divisors (27333602838).

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

21716561322 is a wasteful number, since it uses less digits than its factorization.

21716561322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592835 (or 6592829 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The spelling of 21716561322 in words is "twenty-one billion, seven hundred sixteen million, five hundred sixty-one thousand, three hundred twenty-two".