11122161565 has 8 divisors (see below), whose sum is σ = 13598416728. Its totient is φ = 8729847360.

The previous prime is 11122161551. The next prime is 11122161571. The reversal of 11122161565 is 56516122111.

It can be written as a sum of positive squares in 4 ways, for example, as 1033365316 + 10088796249 = 32146^2 + 100443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11122161565 - 2³¹ = 8974677917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20984946 + ... + 20985475.

It is an arithmetic number, because the mean of its divisors is an integer number (1699802091).

Almost surely, 2^11122161565 is an apocalyptic number.

It is an amenable number.

11122161565 is a deficient number, since it is larger than the sum of its proper divisors (2476255163).

11122161565 is an equidigital number, since it uses as much as digits as its factorization.

11122161565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41970479.

The product of its digits is 3600, while the sum is 31.

Adding to 11122161565 its reverse (56516122111), we get a palindrome (67638283676).

The spelling of 11122161565 in words is "eleven billion, one hundred twenty-two million, one hundred sixty-one thousand, five hundred sixty-five".