16015641 has 4 divisors (see below), whose sum is σ = 21354192. Its totient is φ = 10677092.

The previous prime is 16015619. The next prime is 16015669. The reversal of 16015641 is 14651061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16015641 - 2⁶ = 16015577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16015691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2669271 + ... + 2669276.

It is an arithmetic number, because the mean of its divisors is an integer number (5338548).

Almost surely, 2^16015641 is an apocalyptic number.

It is an amenable number.

16015641 is a deficient number, since it is larger than the sum of its proper divisors (5338551).

16015641 is an equidigital number, since it uses as much as digits as its factorization.

16015641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338550.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16015641 is about 4001.9546474192. The cubic root of 16015641 is about 252.0662933423.

The spelling of 16015641 in words is "sixteen million, fifteen thousand, six hundred forty-one".