16605381306868 has 24 divisors (see below), whose sum is σ = 29069867155392. Its totient is φ = 8299705277184.

The previous prime is 16605381306853. The next prime is 16605381306893. The reversal of 16605381306868 is 86860318350661.

It is a congruent 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, 398313921 + ... + 398355607.

It is an arithmetic number, because the mean of its divisors is an integer number (1211244464808).

Almost surely, 2^{16605381306868} is an apocalyptic number.

It is an amenable number.

16605381306868 is a deficient number, since it is larger than the sum of its proper divisors (12464485848524).

16605381306868 is a wasteful number, since it uses less digits than its factorization.

16605381306868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75111 (or 75109 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 16605381306868 in words is "sixteen trillion, six hundred five billion, three hundred eighty-one million, three hundred six thousand, eight hundred sixty-eight".