11573037217 has 6 divisors (see below), whose sum is σ = 13462512738. Its totient is φ = 9919746144.

The previous prime is 11573037209. The next prime is 11573037239. The reversal of 11573037217 is 71273037511.

It can be written as a sum of positive squares in only one way, i.e., 9675476496 + 1897560721 = 98364^2 + 43561^2 .

It is not a de Polignac number, because 11573037217 - 2³ = 11573037209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11573037247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118092168 + ... + 118092265.

It is an arithmetic number, because the mean of its divisors is an integer number (2243752123).

Almost surely, 2^11573037217 is an apocalyptic number.

It is an amenable number.

11573037217 is a deficient number, since it is larger than the sum of its proper divisors (1889475521).

11573037217 is an equidigital number, since it uses as much as digits as its factorization.

11573037217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236184447 (or 236184440 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 37.

The spelling of 11573037217 in words is "eleven billion, five hundred seventy-three million, thirty-seven thousand, two hundred seventeen".