11055116600561 has 4 divisors (see below), whose sum is σ = 12060127200624. Its totient is φ = 10050106000500.

The previous prime is 11055116600509. The next prime is 11055116600621. The reversal of 11055116600561 is 16500661155011.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11055116600561 - 2²² = 11055112406257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11055116600761) 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, 502505300015 + ... + 502505300036.

It is an arithmetic number, because the mean of its divisors is an integer number (3015031800156).

Almost surely, 2^{11055116600561} is an apocalyptic number.

11055116600561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11055116600561 is a deficient number, since it is larger than the sum of its proper divisors (1005010600063).

11055116600561 is a wasteful number, since it uses less digits than its factorization.

11055116600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005010600062.

The product of its (nonzero) digits is 27000, while the sum is 38.

Adding to 11055116600561 its reverse (16500661155011), we get a palindrome (27555777755572).

The spelling of 11055116600561 in words is "eleven trillion, fifty-five billion, one hundred sixteen million, six hundred thousand, five hundred sixty-one".