61111543 has 8 divisors (see below), whose sum is σ = 64476720. Its totient is φ = 57761280.

The previous prime is 61111517. The next prime is 61111559. The reversal of 61111543 is 34511116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61111543 - 2⁹ = 61111031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111513) 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 in 7 ways as a sum of consecutive naturals, for example, 5271 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (8059590).

Almost surely, 2^61111543 is an apocalyptic number.

61111543 is a deficient number, since it is larger than the sum of its proper divisors (3365177).

61111543 is a wasteful number, since it uses less digits than its factorization.

61111543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457.

The product of its digits is 360, while the sum is 22.

The square root of 61111543 is about 7817.3872233631. The cubic root of 61111543 is about 393.8895113930.

Adding to 61111543 its reverse (34511116), we get a palindrome (95622659).

The spelling of 61111543 in words is "sixty-one million, one hundred eleven thousand, five hundred forty-three".