11051060561 has 4 divisors (see below), whose sum is σ = 11051868324. Its totient is φ = 11050252800.

The previous prime is 11051060551. The next prime is 11051060563. The reversal of 11051060561 is 16506015011.

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 2356617025 + 8694443536 = 48545^2 + 93244^2 .

It is a cyclic number.

It is not a de Polignac number, because 11051060561 - 2³⁰ = 9977318737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11051060561.

It is not an unprimeable number, because it can be changed into a prime (11051060563) 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, 383000 + ... + 410841.

It is an arithmetic number, because the mean of its divisors is an integer number (2762967081).

Almost surely, 2^11051060561 is an apocalyptic number.

It is an amenable number.

11051060561 is a deficient number, since it is larger than the sum of its proper divisors (807763).

11051060561 is an equidigital number, since it uses as much as digits as its factorization.

11051060561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807762.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 11051060561 its reverse (16506015011), we get a palindrome (27557075572).

The spelling of 11051060561 in words is "eleven billion, fifty-one million, sixty thousand, five hundred sixty-one".