16518680453466 has 96 divisors (see below), whose sum is σ = 39704494152960. Its totient is φ = 5128904779776.

The previous prime is 16518680453419. The next prime is 16518680453477. The reversal of 16518680453466 is 66435408681561.

It is a happy number.

16518680453466 is a `hidden beast` number, since 1 + 6 + 5 + 18 + 6 + 80 + 4 + 534 + 6 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9504546 + ... + 11107373.

It is an arithmetic number, because the mean of its divisors is an integer number (413588480760).

Almost surely, 2^{16518680453466} is an apocalyptic number.

16518680453466 is an abundant number, since it is smaller than the sum of its proper divisors (23185813699494).

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

16518680453466 is a wasteful number, since it uses less digits than its factorization.

16518680453466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612050 (or 20612038 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 16518680453466 in words is "sixteen trillion, five hundred eighteen billion, six hundred eighty million, four hundred fifty-three thousand, four hundred sixty-six".