61116511 has 2 divisors, whose sum is σ = 61116512. Its totient is φ = 61116510.

The previous prime is 61116491. The next prime is 61116551. The reversal of 61116511 is 11561116.

61116511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61116511 - 2¹¹ = 61114463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61116551) by changing a digit.

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 as a sum of consecutive naturals, namely, 30558255 + 30558256.

It is an arithmetic number, because the mean of its divisors is an integer number (30558256).

Almost surely, 2^61116511 is an apocalyptic number.

61116511 is a deficient number, since it is larger than the sum of its proper divisors (1).

61116511 is an equidigital number, since it uses as much as digits as its factorization.

61116511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 22.

The square root of 61116511 is about 7817.7049701303. The cubic root of 61116511 is about 393.9001847179.

Adding to 61116511 its reverse (11561116), we get a palindrome (72677627).

The spelling of 61116511 in words is "sixty-one million, one hundred sixteen thousand, five hundred eleven".