11056543257 has 4 divisors (see below), whose sum is σ = 14742057680. Its totient is φ = 7371028836.

The previous prime is 11056543243. The next prime is 11056543261. The reversal of 11056543257 is 75234565011.

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: 75234565011 = 3 ⋅25078188337.

It is not a de Polignac number, because 11056543257 - 2¹⁶ = 11056477721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11056543207) 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, 1842757207 + ... + 1842757212.

It is an arithmetic number, because the mean of its divisors is an integer number (3685514420).

Almost surely, 2^11056543257 is an apocalyptic number.

It is an amenable number.

11056543257 is a deficient number, since it is larger than the sum of its proper divisors (3685514423).

11056543257 is an equidigital number, since it uses as much as digits as its factorization.

11056543257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685514422.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 11056543257 in words is "eleven billion, fifty-six million, five hundred forty-three thousand, two hundred fifty-seven".