16385458361 has 4 divisors (see below), whose sum is σ = 16547690724. Its totient is φ = 16223226000.

The previous prime is 16385458351. The next prime is 16385458367.

16385458361 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15041796025 + 1343662336 = 122645^2 + 36656^2 .

It is not a de Polignac number, because 16385458361 - 2²² = 16381264057 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16385458367) 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, 81116030 + ... + 81116231.

It is an arithmetic number, because the mean of its divisors is an integer number (4136922681).

Almost surely, 2^16385458361 is an apocalyptic number.

It is an amenable number.

16385458361 is a deficient number, since it is larger than the sum of its proper divisors (162232363).

16385458361 is a wasteful number, since it uses less digits than its factorization.

16385458361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162232362.

The product of its digits is 2073600, while the sum is 50.

The spelling of 16385458361 in words is "sixteen billion, three hundred eighty-five million, four hundred fifty-eight thousand, three hundred sixty-one".