16163451643 has 4 divisors (see below), whose sum is σ = 16223095648. Its totient is φ = 16103807640.

The previous prime is 16163451631. The next prime is 16163451659. The reversal of 16163451643 is 34615436161.

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 16163451643 - 2⁵ = 16163451611 is a prime.

It is a super-2 number, since 2×16163451643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16163451596 and 16163451605.

It is not an unprimeable number, because it can be changed into a prime (16163451673) 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, 29821596 + ... + 29822137.

It is an arithmetic number, because the mean of its divisors is an integer number (4055773912).

Almost surely, 2^16163451643 is an apocalyptic number.

16163451643 is a deficient number, since it is larger than the sum of its proper divisors (59644005).

16163451643 is an equidigital number, since it uses as much as digits as its factorization.

16163451643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59644004.

The product of its digits is 155520, while the sum is 40.

The spelling of 16163451643 in words is "sixteen billion, one hundred sixty-three million, four hundred fifty-one thousand, six hundred forty-three".