161111085 has 8 divisors (see below), whose sum is σ = 257777760. Its totient is φ = 85925904.

The previous prime is 161111063. The next prime is 161111087. The reversal of 161111085 is 580111161.

It is a happy number.

161111085 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 not a de Polignac number, because 161111085 - 2⁵ = 161111053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161111087) 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, 5370355 + ... + 5370384.

It is an arithmetic number, because the mean of its divisors is an integer number (32222220).

Almost surely, 2^161111085 is an apocalyptic number.

161111085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161111085 is a deficient number, since it is larger than the sum of its proper divisors (96666675).

161111085 is a wasteful number, since it uses less digits than its factorization.

161111085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740747.

The product of its (nonzero) digits is 240, while the sum is 24.

The square root of 161111085 is about 12692.9541478727. The cubic root of 161111085 is about 544.1372709472.

The spelling of 161111085 in words is "one hundred sixty-one million, one hundred eleven thousand, eighty-five".