161008705 has 32 divisors (see below), whose sum is σ = 230444928. Its totient is φ = 106444800.

The previous prime is 161008703. The next prime is 161008721. The reversal of 161008705 is 507800161.

It is a happy number.

It is not a de Polignac number, because 161008705 - 2¹ = 161008703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161008703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46225 + ... + 49585.

It is an arithmetic number, because the mean of its divisors is an integer number (7201404).

Almost surely, 2^161008705 is an apocalyptic number.

It is an amenable number.

161008705 is a deficient number, since it is larger than the sum of its proper divisors (69436223).

161008705 is a wasteful number, since it uses less digits than its factorization.

161008705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 161008705 is about 12688.9205608673. The cubic root of 161008705 is about 544.0219869736.

Adding to 161008705 its reverse (507800161), we get a palindrome (668808866).

The spelling of 161008705 in words is "one hundred sixty-one million, eight thousand, seven hundred five".