161789085 has 48 divisors (see below), whose sum is σ = 312586560. Its totient is φ = 76930560.

The previous prime is 161789083. The next prime is 161789129. The reversal of 161789085 is 580987161.

161789085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161789085 - 2¹ = 161789083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 161789085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161789083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8970 + ... + 20100.

It is an arithmetic number, because the mean of its divisors is an integer number (6512220).

Almost surely, 2^161789085 is an apocalyptic number.

161789085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161789085 is a deficient number, since it is larger than the sum of its proper divisors (150797475).

161789085 is a wasteful number, since it uses less digits than its factorization.

161789085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178 (or 11175 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 161789085 is about 12719.6338390694. The cubic root of 161789085 is about 544.8994960983.

The spelling of 161789085 in words is "one hundred sixty-one million, seven hundred eighty-nine thousand, eighty-five".