216441125641 has 4 divisors (see below), whose sum is σ = 233090443012. Its totient is φ = 199791808272.

The previous prime is 216441125633. The next prime is 216441125653. The reversal of 216441125641 is 146521144612.

216441125641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 89114190400 + 127326935241 = 298520^2 + 356829^2 .

It is a cyclic number.

It is not a de Polignac number, because 216441125641 - 2³ = 216441125633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216441125641.

It is not an unprimeable number, because it can be changed into a prime (216441123641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8324658666 + ... + 8324658691.

It is an arithmetic number, because the mean of its divisors is an integer number (58272610753).

Almost surely, 2^216441125641 is an apocalyptic number.

It is an amenable number.

216441125641 is a deficient number, since it is larger than the sum of its proper divisors (16649317371).

216441125641 is a wasteful number, since it uses less digits than its factorization.

216441125641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16649317370.

The product of its digits is 46080, while the sum is 37.

The spelling of 216441125641 in words is "two hundred sixteen billion, four hundred forty-one million, one hundred twenty-five thousand, six hundred forty-one".