11154020085 has 128 divisors (see below), whose sum is σ = 22456949760. Its totient is φ = 5211537408.

The previous prime is 11154020063. The next prime is 11154020117. The reversal of 11154020085 is 58002045111.

11154020085 is a `hidden beast` number, since 111 + 540 + 2 + 0 + 0 + 8 + 5 = 666.

It is not a de Polignac number, because 11154020085 - 2⁸ = 11154019829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5528997 + ... + 5531013.

It is an arithmetic number, because the mean of its divisors is an integer number (175444920).

Almost surely, 2^11154020085 is an apocalyptic number.

11154020085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11154020085 is an abundant number, since it is smaller than the sum of its proper divisors (11302929675).

11154020085 is a wasteful number, since it uses less digits than its factorization.

11154020085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 11154020085 its reverse (58002045111), we get a palindrome (69156065196).

The spelling of 11154020085 in words is "eleven billion, one hundred fifty-four million, twenty thousand, eighty-five".