11724508709 has 4 divisors (see below), whose sum is σ = 11724726540. Its totient is φ = 11724290880.

The previous prime is 11724508693. The next prime is 11724508723. The reversal of 11724508709 is 90780542711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90780542711 = 809 ⋅112213279.

It can be written as a sum of positive squares in 2 ways, for example, as 3246150625 + 8478358084 = 56975^2 + 92078^2 .

It is a cyclic number.

It is not a de Polignac number, because 11724508709 - 2⁴ = 11724508693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11724508709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11724508739) 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, 36839 + ... + 157499.

It is an arithmetic number, because the mean of its divisors is an integer number (2931181635).

Almost surely, 2^11724508709 is an apocalyptic number.

It is an amenable number.

11724508709 is a deficient number, since it is larger than the sum of its proper divisors (217831).

11724508709 is an equidigital number, since it uses as much as digits as its factorization.

11724508709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217830.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 11724508709 in words is "eleven billion, seven hundred twenty-four million, five hundred eight thousand, seven hundred nine".