16651506608 has 20 divisors (see below), whose sum is σ = 35195230248. Its totient is φ = 7568866560.

The previous prime is 16651506601. The next prime is 16651506617. The reversal of 16651506608 is 80660515661.

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

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (16651506601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47305241 + ... + 47305592.

Almost surely, 2^16651506608 is an apocalyptic number.

It is an amenable number.

16651506608 is an abundant number, since it is smaller than the sum of its proper divisors (18543723640).

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

16651506608 is a wasteful number, since it uses less digits than its factorization.

16651506608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94610852 (or 94610846 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 16651506608 in words is "sixteen billion, six hundred fifty-one million, five hundred six thousand, six hundred eight".