21773119616 has 64 divisors (see below), whose sum is σ = 45706444800. Its totient is φ = 10302888960.

The previous prime is 21773119609. The next prime is 21773119637. The reversal of 21773119616 is 61691137712.

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2654081 + ... + 2662271.

It is an arithmetic number, because the mean of its divisors is an integer number (714163200).

Almost surely, 2^21773119616 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 21773119616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22853222400).

21773119616 is an abundant number, since it is smaller than the sum of its proper divisors (23933325184).

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

21773119616 is a wasteful number, since it uses less digits than its factorization.

21773119616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317 (or 9305 counting only the distinct ones).

The product of its digits is 95256, while the sum is 44.

The spelling of 21773119616 in words is "twenty-one billion, seven hundred seventy-three million, one hundred nineteen thousand, six hundred sixteen".