11061560209 has 4 divisors (see below), whose sum is σ = 12641783104. Its totient is φ = 9481337316.

The previous prime is 11061560183. The next prime is 11061560231. The reversal of 11061560209 is 90206516011.

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: 90206516011 = 19 ⋅4747711369.

It is a cyclic number.

It is not a de Polignac number, because 11061560209 - 2¹⁵ = 11061527441 is a prime.

It is a super-2 number, since 2×11061560209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11061560249) 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, 790111437 + ... + 790111450.

It is an arithmetic number, because the mean of its divisors is an integer number (3160445776).

Almost surely, 2^11061560209 is an apocalyptic number.

It is an amenable number.

11061560209 is a deficient number, since it is larger than the sum of its proper divisors (1580222895).

11061560209 is an equidigital number, since it uses as much as digits as its factorization.

11061560209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580222894.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 11061560209 in words is "eleven billion, sixty-one million, five hundred sixty thousand, two hundred nine".