111705661441 has 8 divisors (see below), whose sum is σ = 128274444000. Its totient is φ = 96205832640.

The previous prime is 111705661439. The next prime is 111705661451. The reversal of 111705661441 is 144166507111.

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 111705661441 - 2¹ = 111705661439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111705661441.

It is not an unprimeable number, because it can be changed into a prime (111705661451) 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, 267238216 + ... + 267238633.

It is an arithmetic number, because the mean of its divisors is an integer number (16034305500).

Almost surely, 2^111705661441 is an apocalyptic number.

111705661441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111705661441 is a deficient number, since it is larger than the sum of its proper divisors (16568782559).

111705661441 is a wasteful number, since it uses less digits than its factorization.

111705661441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534476879.

The product of its (nonzero) digits is 20160, while the sum is 37.

It can be divided in two parts, 111705 and 661441, that added together give a triangular number (773146 = T₁₂₄₃).

The spelling of 111705661441 in words is "one hundred eleven billion, seven hundred five million, six hundred sixty-one thousand, four hundred forty-one".