16640616165 has 16 divisors (see below), whose sum is σ = 26627251200. Its totient is φ = 8874240192.

The previous prime is 16640616163. The next prime is 16640616191. The reversal of 16640616165 is 56161604661.

It is not a de Polignac number, because 16640616165 - 2¹ = 16640616163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640616163) 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, 166071 + ... + 246699.

It is an arithmetic number, because the mean of its divisors is an integer number (1664203200).

Almost surely, 2^16640616165 is an apocalyptic number.

16640616165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16640616165 is a deficient number, since it is larger than the sum of its proper divisors (9986635035).

16640616165 is a wasteful number, since it uses less digits than its factorization.

16640616165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94396.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 16640616165 in words is "sixteen billion, six hundred forty million, six hundred sixteen thousand, one hundred sixty-five".