16165680687441 has 12 divisors (see below), whose sum is σ = 24579397536720. Its totient is φ = 10209903591960.

The previous prime is 16165680687433. The next prime is 16165680687493. The reversal of 16165680687441 is 14478608656161.

16165680687441 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 56 + 80 + 68 + 7 + 441 = 666.

It is not a de Polignac number, because 16165680687441 - 2³ = 16165680687433 is a prime.

It is a super-2 number, since 2×16165680687441² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16165680687841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47268072015 + ... + 47268072356.

It is an arithmetic number, because the mean of its divisors is an integer number (2048283128060).

Almost surely, 2^{16165680687441} is an apocalyptic number.

It is an amenable number.

16165680687441 is a deficient number, since it is larger than the sum of its proper divisors (8413716849279).

16165680687441 is a wasteful number, since it uses less digits than its factorization.

16165680687441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94536144396 (or 94536144393 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 16165680687441 in words is "sixteen trillion, one hundred sixty-five billion, six hundred eighty million, six hundred eighty-seven thousand, four hundred forty-one".