16001641 has 8 divisors (see below), whose sum is σ = 17006760. Its totient is φ = 15055744.

The previous prime is 16001599. The next prime is 16001659. The reversal of 16001641 is 14610061.

It is a happy number.

16001641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5736025 + 10265616 = 2395^2 + 3204^2 .

It is not a de Polignac number, because 16001641 - 2⁹ = 16001129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16001681) 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, 3285 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (2125845).

Almost surely, 2^16001641 is an apocalyptic number.

It is an amenable number.

16001641 is a deficient number, since it is larger than the sum of its proper divisors (1005119).

16001641 is an frugal number, since it uses more digits than its factorization.

16001641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308 (or 3274 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16001641 is about 4000.2051197407. The cubic root of 16001641 is about 251.9928243947.

It can be divided in two parts, 160016 and 41, that multiplied together give a palindrome (6560656).

The spelling of 16001641 in words is "sixteen million, one thousand, six hundred forty-one".