161445853 has 2 divisors, whose sum is σ = 161445854. Its totient is φ = 161445852.

The previous prime is 161445847. The next prime is 161445863. The reversal of 161445853 is 358544161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86155524 + 75290329 = 9282^2 + 8677^2 .

It is a cyclic number.

It is not a de Polignac number, because 161445853 - 2¹⁷ = 161314781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161445863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80722926 + 80722927.

It is an arithmetic number, because the mean of its divisors is an integer number (80722927).

Almost surely, 2^161445853 is an apocalyptic number.

It is an amenable number.

161445853 is a deficient number, since it is larger than the sum of its proper divisors (1).

161445853 is an equidigital number, since it uses as much as digits as its factorization.

161445853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 161445853 is about 12706.1344633213. The cubic root of 161445853 is about 544.5138925046.

The spelling of 161445853 in words is "one hundred sixty-one million, four hundred forty-five thousand, eight hundred fifty-three".