16605633612 has 24 divisors (see below), whose sum is σ = 38818113712. Its totient is φ = 5524977600.

The previous prime is 16605633571. The next prime is 16605633641. The reversal of 16605633612 is 21633650661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272439 + ... + 1285422.

Almost surely, 2^16605633612 is an apocalyptic number.

16605633612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16605633612 is an abundant number, since it is smaller than the sum of its proper divisors (22212480100).

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

16605633612 is a wasteful number, since it uses less digits than its factorization.

16605633612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558409 (or 2558407 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 16605633612 in words is "sixteen billion, six hundred five million, six hundred thirty-three thousand, six hundred twelve".