161832385 has 32 divisors (see below), whose sum is σ = 230283648. Its totient is φ = 107627520.

The previous prime is 161832379. The next prime is 161832389. The reversal of 161832385 is 583238161.

161832385 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 161832385 - 2¹⁷ = 161701313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161832389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79794 + ... + 81796.

It is an arithmetic number, because the mean of its divisors is an integer number (7196364).

Almost surely, 2^161832385 is an apocalyptic number.

161832385 is the 7345-th octagonal number.

It is an amenable number.

161832385 is a deficient number, since it is larger than the sum of its proper divisors (68451263).

161832385 is a wasteful number, since it uses less digits than its factorization.

161832385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145.

The product of its digits is 34560, while the sum is 37.

The square root of 161832385 is about 12721.3358182229. The cubic root of 161832385 is about 544.9481026811.

The spelling of 161832385 in words is "one hundred sixty-one million, eight hundred thirty-two thousand, three hundred eighty-five".