16865138067 has 4 divisors (see below), whose sum is σ = 22486850760. Its totient is φ = 11243425376.

The previous prime is 16865138063. The next prime is 16865138107. The reversal of 16865138067 is 76083156861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16865138067 - 2² = 16865138063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16865138063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2810856342 + ... + 2810856347.

It is an arithmetic number, because the mean of its divisors is an integer number (5621712690).

Almost surely, 2^16865138067 is an apocalyptic number.

16865138067 is a deficient number, since it is larger than the sum of its proper divisors (5621712693).

16865138067 is an equidigital number, since it uses as much as digits as its factorization.

16865138067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5621712692.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 16865138067 in words is "sixteen billion, eight hundred sixty-five million, one hundred thirty-eight thousand, sixty-seven".