161266453 has 4 divisors (see below), whose sum is σ = 161398060. Its totient is φ = 161134848.

The previous prime is 161266451. The next prime is 161266463. The reversal of 161266453 is 354662161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81396484 + 79869969 = 9022^2 + 8937^2 .

It is a cyclic number.

It is not a de Polignac number, because 161266453 - 2¹ = 161266451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161266451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63948 + ... + 66421.

It is an arithmetic number, because the mean of its divisors is an integer number (40349515).

Almost surely, 2^161266453 is an apocalyptic number.

It is an amenable number.

161266453 is a deficient number, since it is larger than the sum of its proper divisors (131607).

161266453 is a wasteful number, since it uses less digits than its factorization.

161266453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131606.

The product of its digits is 25920, while the sum is 34.

The square root of 161266453 is about 12699.0729189181. The cubic root of 161266453 is about 544.3121282682.

The spelling of 161266453 in words is "one hundred sixty-one million, two hundred sixty-six thousand, four hundred fifty-three".