16605555612 has 24 divisors (see below), whose sum is σ = 38843905296. Its totient is φ = 5521241088.

The previous prime is 16605555611. The next prime is 16605555667. The reversal of 16605555612 is 21655550661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605555611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1738053 + ... + 1747580.

It is an arithmetic number, because the mean of its divisors is an integer number (1618496054).

Almost surely, 2^16605555612 is an apocalyptic number.

16605555612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16605555612 is an abundant number, since it is smaller than the sum of its proper divisors (22238349684).

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

16605555612 is a wasteful number, since it uses less digits than its factorization.

16605555612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486037 (or 3486035 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 16605555612 in words is "sixteen billion, six hundred five million, five hundred fifty-five thousand, six hundred twelve".