161324653 has 4 divisors (see below), whose sum is σ = 184371040. Its totient is φ = 138278268.

The previous prime is 161324641. The next prime is 161324659. The reversal of 161324653 is 356423161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356423161 = 10771 ⋅33091.

It is a cyclic number.

It is not a de Polignac number, because 161324653 - 2¹³ = 161316461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161324659) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11523183 + ... + 11523196.

It is an arithmetic number, because the mean of its divisors is an integer number (46092760).

Almost surely, 2^161324653 is an apocalyptic number.

It is an amenable number.

161324653 is a deficient number, since it is larger than the sum of its proper divisors (23046387).

161324653 is an equidigital number, since it uses as much as digits as its factorization.

161324653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23046386.

The product of its digits is 12960, while the sum is 31.

The square root of 161324653 is about 12701.3642180673. The cubic root of 161324653 is about 544.3775999459.

The spelling of 161324653 in words is "one hundred sixty-one million, three hundred twenty-four thousand, six hundred fifty-three".