61116111 has 48 divisors (see below), whose sum is σ = 104080704. Its totient is φ = 33841152.

The previous prime is 61116101. The next prime is 61116113. The reversal of 61116111 is 11161116.

It is not a de Polignac number, because 61116111 - 2⁶ = 61116047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61116113) by changing a digit.

It is a Kaprekar number, because its square (3735179023764321) can be partitioned into two parts whose sum is 61116111.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 446035 + ... + 446171.

It is an arithmetic number, because the mean of its divisors is an integer number (2168348).

Almost surely, 2^61116111 is an apocalyptic number.

61116111 is a deficient number, since it is larger than the sum of its proper divisors (42964593).

61116111 is a wasteful number, since it uses less digits than its factorization.

61116111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 317 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 61116111 is about 7817.6793871327. The cubic root of 61116111 is about 393.8993253734.

Adding to 61116111 its reverse (11161116), we get a palindrome (72277227).

It can be divided in two parts, 61116 and 111, that multiplied together give a palindrome (6783876).

The spelling of 61116111 in words is "sixty-one million, one hundred sixteen thousand, one hundred eleven".