161532705 has 8 divisors (see below), whose sum is σ = 258452352. Its totient is φ = 86150768.

The previous prime is 161532673. The next prime is 161532733. The reversal of 161532705 is 507235161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161532705 - 2⁵ = 161532673 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5384409 + ... + 5384438.

It is an arithmetic number, because the mean of its divisors is an integer number (32306544).

Almost surely, 2^161532705 is an apocalyptic number.

161532705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161532705 is a deficient number, since it is larger than the sum of its proper divisors (96919647).

161532705 is a wasteful number, since it uses less digits than its factorization.

161532705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768855.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 161532705 is about 12709.5517230153. The cubic root of 161532705 is about 544.6115178937.

Adding to 161532705 its reverse (507235161), we get a palindrome (668767866).

The spelling of 161532705 in words is "one hundred sixty-one million, five hundred thirty-two thousand, seven hundred five".