11005612161 has 4 divisors (see below), whose sum is σ = 14674149552. Its totient is φ = 7337074772.

The previous prime is 11005612151. The next prime is 11005612169. The reversal of 11005612161 is 16121650011.

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 11005612161 - 2⁵ = 11005612129 is a prime.

It is a super-4 number, since 4×11005612161⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11005612169) 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, 1834268691 + ... + 1834268696.

It is an arithmetic number, because the mean of its divisors is an integer number (3668537388).

Almost surely, 2^11005612161 is an apocalyptic number.

It is an amenable number.

11005612161 is a deficient number, since it is larger than the sum of its proper divisors (3668537391).

11005612161 is an equidigital number, since it uses as much as digits as its factorization.

11005612161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668537390.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 11005612161 in words is "eleven billion, five million, six hundred twelve thousand, one hundred sixty-one".