16609555968 has 320 divisors, whose sum is σ = 49213992960. Its totient is φ = 4971724800.

The previous prime is 16609555957. The next prime is 16609555969. The reversal of 16609555968 is 86955590661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16609555969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233937373 + ... + 233937443.

It is an arithmetic number, because the mean of its divisors is an integer number (153793728).

Almost surely, 2^16609555968 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 16609555968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24606996480).

16609555968 is an abundant number, since it is smaller than the sum of its proper divisors (32604436992).

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

16609555968 is an frugal number, since it uses more digits than its factorization.

16609555968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 60.

The spelling of 16609555968 in words is "sixteen billion, six hundred nine million, five hundred fifty-five thousand, nine hundred sixty-eight".