11205513437057 has 4 divisors (see below), whose sum is σ = 11227528198740. Its totient is φ = 11183498675376.

The previous prime is 11205513437047. The next prime is 11205513437093. The reversal of 11205513437057 is 75073431550211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5332917294721 + 5872596142336 = 2309311^2 + 2423344^2 .

It is a cyclic number.

It is not a de Polignac number, because 11205513437057 - 2³⁰ = 11204439695233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11205513436999 and 11205513437017.

It is not an unprimeable number, because it can be changed into a prime (11205513437047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007380078 + ... + 11007381095.

It is an arithmetic number, because the mean of its divisors is an integer number (2806882049685).

Almost surely, 2^{11205513437057} is an apocalyptic number.

It is an amenable number.

11205513437057 is a deficient number, since it is larger than the sum of its proper divisors (22014761683).

11205513437057 is an equidigital number, since it uses as much as digits as its factorization.

11205513437057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22014761682.

The product of its (nonzero) digits is 441000, while the sum is 44.

Adding to 11205513437057 its reverse (75073431550211), we get a palindrome (86278944987268).

The spelling of 11205513437057 in words is "eleven trillion, two hundred five billion, five hundred thirteen million, four hundred thirty-seven thousand, fifty-seven".