11725543617 has 4 divisors (see below), whose sum is σ = 15634058160. Its totient is φ = 7817029076.

The previous prime is 11725543607. The next prime is 11725543619. The reversal of 11725543617 is 71634552711.

11725543617 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11725543617 - 2¹⁰ = 11725542593 is a prime.

It is a super-2 number, since 2×11725543617² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11725543619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954257267 + ... + 1954257272.

It is an arithmetic number, because the mean of its divisors is an integer number (3908514540).

Almost surely, 2^11725543617 is an apocalyptic number.

It is an amenable number.

11725543617 is a deficient number, since it is larger than the sum of its proper divisors (3908514543).

11725543617 is an equidigital number, since it uses as much as digits as its factorization.

11725543617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908514542.

The product of its digits is 176400, while the sum is 42.

The spelling of 11725543617 in words is "eleven billion, seven hundred twenty-five million, five hundred forty-three thousand, six hundred seventeen".