16540658165 has 16 divisors (see below), whose sum is σ = 20235468288. Its totient is φ = 12976514496.

The previous prime is 16540658161. The next prime is 16540658177. The reversal of 16540658165 is 56185604561.

It is a cyclic number.

It is not a de Polignac number, because 16540658165 - 2² = 16540658161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540658161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36002 + ... + 185411.

It is an arithmetic number, because the mean of its divisors is an integer number (1264716768).

Almost surely, 2^16540658165 is an apocalyptic number.

It is an amenable number.

16540658165 is a deficient number, since it is larger than the sum of its proper divisors (3694810123).

16540658165 is a wasteful number, since it uses less digits than its factorization.

16540658165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221708.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 16540658165 in words is "sixteen billion, five hundred forty million, six hundred fifty-eight thousand, one hundred sixty-five".