161433605 has 16 divisors (see below), whose sum is σ = 198894528. Its totient is φ = 125712000.

The previous prime is 161433599. The next prime is 161433659. The reversal of 161433605 is 506334161.

It is a happy number.

It is not a de Polignac number, because 161433605 - 2²⁴ = 144656389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165770 + ... + 166740.

It is an arithmetic number, because the mean of its divisors is an integer number (12430908).

Almost surely, 2^161433605 is an apocalyptic number.

It is an amenable number.

161433605 is a deficient number, since it is larger than the sum of its proper divisors (37460923).

161433605 is an equidigital number, since it uses as much as digits as its factorization.

161433605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 161433605 is about 12705.6524822616. The cubic root of 161433605 is about 544.5001224084.

Adding to 161433605 its reverse (506334161), we get a palindrome (667767766).

The spelling of 161433605 in words is "one hundred sixty-one million, four hundred thirty-three thousand, six hundred five".