16105675921 has 4 divisors (see below), whose sum is σ = 16228620144. Its totient is φ = 15982731700.

The previous prime is 16105675919. The next prime is 16105675933. The reversal of 16105675921 is 12957650161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16105675921 - 2¹ = 16105675919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16105675961) 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, 61471915 + ... + 61472176.

It is an arithmetic number, because the mean of its divisors is an integer number (4057155036).

Almost surely, 2^16105675921 is an apocalyptic number.

It is an amenable number.

16105675921 is a deficient number, since it is larger than the sum of its proper divisors (122944223).

16105675921 is a wasteful number, since it uses less digits than its factorization.

16105675921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122944222.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 16105675921 in words is "sixteen billion, one hundred five million, six hundred seventy-five thousand, nine hundred twenty-one".