16641311653 has 4 divisors (see below), whose sum is σ = 16645962348. Its totient is φ = 16636660960.

The previous prime is 16641311627. The next prime is 16641311677. The reversal of 16641311653 is 35611314661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6358946049 + 10282365604 = 79743^2 + 101402^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641311653 - 2²⁹ = 16104440741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641311683) 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, 2319976 + ... + 2327137.

It is an arithmetic number, because the mean of its divisors is an integer number (4161490587).

Almost surely, 2^16641311653 is an apocalyptic number.

It is an amenable number.

16641311653 is a deficient number, since it is larger than the sum of its proper divisors (4650695).

16641311653 is an equidigital number, since it uses as much as digits as its factorization.

16641311653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650694.

The product of its digits is 38880, while the sum is 37.

The spelling of 16641311653 in words is "sixteen billion, six hundred forty-one million, three hundred eleven thousand, six hundred fifty-three".