161338685 has 16 divisors (see below), whose sum is σ = 200793216. Its totient is φ = 124348608.

The previous prime is 161338673. The next prime is 161338699. The reversal of 161338685 is 586833161.

It is a cyclic number.

It is not a de Polignac number, because 161338685 - 2¹⁶ = 161273149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14822 + ... + 23288.

It is an arithmetic number, because the mean of its divisors is an integer number (12549576).

Almost surely, 2^161338685 is an apocalyptic number.

It is an amenable number.

161338685 is a deficient number, since it is larger than the sum of its proper divisors (39454531).

161338685 is a wasteful number, since it uses less digits than its factorization.

161338685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612.

The product of its digits is 103680, while the sum is 41.

The square root of 161338685 is about 12701.9165876650. The cubic root of 161338685 is about 544.3933827890.

The spelling of 161338685 in words is "one hundred sixty-one million, three hundred thirty-eight thousand, six hundred eighty-five".