16181641 has 8 divisors (see below), whose sum is σ = 18555264. Its totient is φ = 13823520.

The previous prime is 16181629. The next prime is 16181647. The reversal of 16181641 is 14618161.

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 16181641 - 2¹⁷ = 16050569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16181647) 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, 1540 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (2319408).

Almost surely, 2^16181641 is an apocalyptic number.

It is an amenable number.

16181641 is a deficient number, since it is larger than the sum of its proper divisors (2373623).

16181641 is an equidigital number, since it uses as much as digits as its factorization.

16181641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751.

The product of its digits is 1152, while the sum is 28.

The square root of 16181641 is about 4022.6410478689. The cubic root of 16181641 is about 252.9341796313.

The spelling of 16181641 in words is "sixteen million, one hundred eighty-one thousand, six hundred forty-one".