16105216665 has 16 divisors (see below), whose sum is σ = 26078810688. Its totient is φ = 8485960896.

The previous prime is 16105216661. The next prime is 16105216669. The reversal of 16105216665 is 56661250161.

It is an interprime number because it is at equal distance from previous prime (16105216661) and next prime (16105216669).

It is not a de Polignac number, because 16105216665 - 2² = 16105216661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16105216661) 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, 6466714 + ... + 6469203.

It is an arithmetic number, because the mean of its divisors is an integer number (1629925668).

Almost surely, 2^16105216665 is an apocalyptic number.

16105216665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16105216665 is a deficient number, since it is larger than the sum of its proper divisors (9973594023).

16105216665 is a wasteful number, since it uses less digits than its factorization.

16105216665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12936008.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 16105216665 in words is "sixteen billion, one hundred five million, two hundred sixteen thousand, six hundred sixty-five".