2111643361441 has 4 divisors (see below), whose sum is σ = 2127056816772. Its totient is φ = 2096229906112.

The previous prime is 2111643361439. The next prime is 2111643361517. The reversal of 2111643361441 is 1441633461112.

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 1222528262400 + 889115099041 = 1105680^2 + 942929^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111643361441 - 2¹ = 2111643361439 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 2111643361441.

It is not an unprimeable number, because it can be changed into a prime (2111643361411) 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, 7706727460 + ... + 7706727733.

It is an arithmetic number, because the mean of its divisors is an integer number (531764204193).

Almost surely, 2^{2111643361441} is an apocalyptic number.

It is an amenable number.

2111643361441 is a deficient number, since it is larger than the sum of its proper divisors (15413455331).

2111643361441 is a wasteful number, since it uses less digits than its factorization.

2111643361441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15413455330.

The product of its digits is 41472, while the sum is 37.

The spelling of 2111643361441 in words is "two trillion, one hundred eleven billion, six hundred forty-three million, three hundred sixty-one thousand, four hundred forty-one".