11568329857 has 4 divisors (see below), whose sum is σ = 13220948416. Its totient is φ = 9915711300.

The previous prime is 11568329821. The next prime is 11568329879. The reversal of 11568329857 is 75892386511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75892386511 = 115301 ⋅658211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11568329857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11568329798 and 11568329807.

It is not an unprimeable number, because it can be changed into a prime (11568329807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826309269 + ... + 826309282.

It is an arithmetic number, because the mean of its divisors is an integer number (3305237104).

Almost surely, 2^11568329857 is an apocalyptic number.

It is an amenable number.

11568329857 is a deficient number, since it is larger than the sum of its proper divisors (1652618559).

11568329857 is an equidigital number, since it uses as much as digits as its factorization.

11568329857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652618558.

The product of its digits is 3628800, while the sum is 55.

The spelling of 11568329857 in words is "eleven billion, five hundred sixty-eight million, three hundred twenty-nine thousand, eight hundred fifty-seven".