161011806 has 16 divisors (see below), whose sum is σ = 322556304. Its totient is φ = 53581824.

The previous prime is 161011771. The next prime is 161011813. The reversal of 161011806 is 608110161.

161011806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18211 + ... + 25566.

It is an arithmetic number, because the mean of its divisors is an integer number (20159769).

Almost surely, 2^161011806 is an apocalyptic number.

161011806 is an abundant number, since it is smaller than the sum of its proper divisors (161544498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161011806 is a wasteful number, since it uses less digits than its factorization.

161011806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44395.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 161011806 is about 12689.0427534941. The cubic root of 161011806 is about 544.0254795412.

Adding to 161011806 its reverse (608110161), we get a palindrome (769121967).

The spelling of 161011806 in words is "one hundred sixty-one million, eleven thousand, eight hundred six".