11081560261 has 4 divisors (see below), whose sum is σ = 11090040192. Its totient is φ = 11073080332.

The previous prime is 11081560249. The next prime is 11081560283. The reversal of 11081560261 is 16206518011.

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 11081560261 - 2¹⁵ = 11081527493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11081560291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238005 + ... + 4240618.

It is an arithmetic number, because the mean of its divisors is an integer number (2772510048).

Almost surely, 2^11081560261 is an apocalyptic number.

It is an amenable number.

11081560261 is a deficient number, since it is larger than the sum of its proper divisors (8479931).

11081560261 is an equidigital number, since it uses as much as digits as its factorization.

11081560261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479930.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 11081560261 in words is "eleven billion, eighty-one million, five hundred sixty thousand, two hundred sixty-one".