61111159 has 2 divisors, whose sum is σ = 61111160. Its totient is φ = 61111158.

The previous prime is 61111133. The next prime is 61111181. The reversal of 61111159 is 95111116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61111159 - 2⁷ = 61111031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61111129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555579 + 30555580.

It is an arithmetic number, because the mean of its divisors is an integer number (30555580).

Almost surely, 2^61111159 is an apocalyptic number.

61111159 is a deficient number, since it is larger than the sum of its proper divisors (1).

61111159 is an equidigital number, since it uses as much as digits as its factorization.

61111159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 25.

The square root of 61111159 is about 7817.3626626887. The cubic root of 61111159 is about 393.8886863776. Note that the first 3 decimals are identical.

The spelling of 61111159 in words is "sixty-one million, one hundred eleven thousand, one hundred fifty-nine".