16375681 has 8 divisors (see below), whose sum is σ = 18759680. Its totient is φ = 14002848.

The previous prime is 16375669. The next prime is 16375703. The reversal of 16375681 is 18657361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16375681 - 2⁵ = 16375649 is a prime.

It is a super-2 number, since 2×16375681² = 536325856427522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16375681.

It is not an unprimeable number, because it can be changed into a prime (16375481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640 + ... + 5758.

It is an arithmetic number, because the mean of its divisors is an integer number (2344960).

Almost surely, 2^16375681 is an apocalyptic number.

It is an amenable number.

16375681 is a deficient number, since it is larger than the sum of its proper divisors (2383999).

16375681 is an equidigital number, since it uses as much as digits as its factorization.

16375681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583.

The product of its digits is 30240, while the sum is 37.

The square root of 16375681 is about 4046.6876578258. The cubic root of 16375681 is about 253.9411740928.

The spelling of 16375681 in words is "sixteen million, three hundred seventy-five thousand, six hundred eighty-one".