161244453 has 16 divisors (see below), whose sum is σ = 221253120. Its totient is φ = 104394864.

The previous prime is 161244449. The next prime is 161244487. The reversal of 161244453 is 354442161.

It is not a de Polignac number, because 161244453 - 2² = 161244449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161244453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161244403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19600 + ... + 26582.

It is an arithmetic number, because the mean of its divisors is an integer number (13828320).

Almost surely, 2^161244453 is an apocalyptic number.

It is an amenable number.

161244453 is a deficient number, since it is larger than the sum of its proper divisors (60008667).

161244453 is a wasteful number, since it uses less digits than its factorization.

161244453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7208.

The product of its digits is 11520, while the sum is 30.

The square root of 161244453 is about 12698.2066844102. The cubic root of 161244453 is about 544.2873754214.

The spelling of 161244453 in words is "one hundred sixty-one million, two hundred forty-four thousand, four hundred fifty-three".