16642726041 has 4 divisors (see below), whose sum is σ = 22190301392. Its totient is φ = 11095150692.

The previous prime is 16642726039. The next prime is 16642726057. The reversal of 16642726041 is 14062724661.

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 not a de Polignac number, because 16642726041 - 2¹ = 16642726039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16642726241) 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, 2773787671 + ... + 2773787676.

It is an arithmetic number, because the mean of its divisors is an integer number (5547575348).

Almost surely, 2^16642726041 is an apocalyptic number.

It is an amenable number.

16642726041 is a deficient number, since it is larger than the sum of its proper divisors (5547575351).

16642726041 is an equidigital number, since it uses as much as digits as its factorization.

16642726041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547575350.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 16642726041 in words is "sixteen billion, six hundred forty-two million, seven hundred twenty-six thousand, forty-one".