11572561217 has 8 divisors (see below), whose sum is σ = 13310026176. Its totient is φ = 9856156752.

The previous prime is 11572561213. The next prime is 11572561219. The reversal of 11572561217 is 71216527511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11572561217 - 2² = 11572561213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11572561213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5263943 + ... + 5266140.

It is an arithmetic number, because the mean of its divisors is an integer number (1663753272).

Almost surely, 2^11572561217 is an apocalyptic number.

It is an amenable number.

11572561217 is a deficient number, since it is larger than the sum of its proper divisors (1737464959).

11572561217 is a wasteful number, since it uses less digits than its factorization.

11572561217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530247.

The product of its digits is 29400, while the sum is 38.

The spelling of 11572561217 in words is "eleven billion, five hundred seventy-two million, five hundred sixty-one thousand, two hundred seventeen".