11123461665 has 24 divisors (see below), whose sum is σ = 19729057920. Its totient is φ = 5794546464.

The previous prime is 11123461603. The next prime is 11123461681. The reversal of 11123461665 is 56616432111.

11123461665 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 34 + 616 + 6 + 5 = 666.

It is not a de Polignac number, because 11123461665 - 2⁷ = 11123461537 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2872345 + ... + 2876214.

It is an arithmetic number, because the mean of its divisors is an integer number (822044080).

Almost surely, 2^11123461665 is an apocalyptic number.

11123461665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11123461665 is a deficient number, since it is larger than the sum of its proper divisors (8605596255).

11123461665 is a wasteful number, since it uses less digits than its factorization.

11123461665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748613 (or 5748610 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

Adding to 11123461665 its reverse (56616432111), we get a palindrome (67739893776).

The spelling of 11123461665 in words is "eleven billion, one hundred twenty-three million, four hundred sixty-one thousand, six hundred sixty-five".