61110561111 has 8 divisors (see below), whose sum is σ = 81520717440. Its totient is φ = 40720389432.

The previous prime is 61110561059. The next prime is 61110561133. The reversal of 61110561111 is 11116501116.

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

It is not a de Polignac number, because 61110561111 - 2¹⁰ = 61110560087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61110521111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4989025 + ... + 5001258.

It is an arithmetic number, because the mean of its divisors is an integer number (10190089680).

Almost surely, 2^61110561111 is an apocalyptic number.

61110561111 is a deficient number, since it is larger than the sum of its proper divisors (20410156329).

61110561111 is a wasteful number, since it uses less digits than its factorization.

61110561111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9992325.

The product of its (nonzero) digits is 180, while the sum is 24.

The spelling of 61110561111 in words is "sixty-one billion, one hundred ten million, five hundred sixty-one thousand, one hundred eleven".