11547043217 has 2 divisors, whose sum is σ = 11547043218. Its totient is φ = 11547043216.

The previous prime is 11547043177. The next prime is 11547043231. The reversal of 11547043217 is 71234074511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8753286481 + 2793756736 = 93559^2 + 52856^2 .

It is a cyclic number.

It is not a de Polignac number, because 11547043217 - 2⁸ = 11547042961 is a prime.

It is not a weakly prime, because it can be changed into another prime (11547043247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5773521608 + 5773521609.

It is an arithmetic number, because the mean of its divisors is an integer number (5773521609).

Almost surely, 2^11547043217 is an apocalyptic number.

It is an amenable number.

11547043217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11547043217 is an equidigital number, since it uses as much as digits as its factorization.

11547043217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 11547043217 in words is "eleven billion, five hundred forty-seven million, forty-three thousand, two hundred seventeen".