163555453 has 8 divisors (see below), whose sum is σ = 173328120. Its totient is φ = 153799680.

The previous prime is 163555433. The next prime is 163555471. The reversal of 163555453 is 354555361.

It can be written as a sum of positive squares in 4 ways, for example, as 12830724 + 150724729 = 3582^2 + 12277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163555453 - 2⁵ = 163555421 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 (163555433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19603 + ... + 26671.

It is an arithmetic number, because the mean of its divisors is an integer number (21666015).

Almost surely, 2^163555453 is an apocalyptic number.

It is an amenable number.

163555453 is a deficient number, since it is larger than the sum of its proper divisors (9772667).

163555453 is a wasteful number, since it uses less digits than its factorization.

163555453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447.

The product of its digits is 135000, while the sum is 37.

The square root of 163555453 is about 12788.8800526082. The cubic root of 163555453 is about 546.8753429897.

The spelling of 163555453 in words is "one hundred sixty-three million, five hundred fifty-five thousand, four hundred fifty-three".