61105511111 has 8 divisors (see below), whose sum is σ = 62201068800. Its totient is φ = 60011949240.

The previous prime is 61105511099. The next prime is 61105511147. The reversal of 61105511111 is 11111550116.

61105511111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61105511111 - 2¹⁴ = 61105494727 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 (61105511191) 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, 437105 + ... + 559706.

It is an arithmetic number, because the mean of its divisors is an integer number (7775133600).

Almost surely, 2^61105511111 is an apocalyptic number.

61105511111 is a deficient number, since it is larger than the sum of its proper divisors (1095557689).

61105511111 is a wasteful number, since it uses less digits than its factorization.

61105511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997909.

The product of its (nonzero) digits is 150, while the sum is 23.

The spelling of 61105511111 in words is "sixty-one billion, one hundred five million, five hundred eleven thousand, one hundred eleven".