11720684641573 has 4 divisors (see below), whose sum is σ = 11720902159980. Its totient is φ = 11720467123168.

The previous prime is 11720684641559. The next prime is 11720684641579. The reversal of 11720684641573 is 37514648602711.

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 9034340695524 + 2686343946049 = 3005718^2 + 1639007^2 .

It is a cyclic number.

It is not a de Polignac number, because 11720684641573 - 2²⁵ = 11720651087141 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 (11720684641579) 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, 108678358 + ... + 108786151.

It is an arithmetic number, because the mean of its divisors is an integer number (2930225539995).

Almost surely, 2^{11720684641573} is an apocalyptic number.

It is an amenable number.

11720684641573 is a deficient number, since it is larger than the sum of its proper divisors (217518407).

11720684641573 is an equidigital number, since it uses as much as digits as its factorization.

11720684641573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217518406.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 11720684641573 in words is "eleven trillion, seven hundred twenty billion, six hundred eighty-four million, six hundred forty-one thousand, five hundred seventy-three".