163434240355 has 4 divisors (see below), whose sum is σ = 196121088432. Its totient is φ = 130747392280.

The previous prime is 163434240353. The next prime is 163434240367. The reversal of 163434240355 is 553042434361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553042434361 = 25679 ⋅21536759.

It is not a de Polignac number, because 163434240355 - 2¹ = 163434240353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163434240353) 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, 16343424031 + ... + 16343424040.

It is an arithmetic number, because the mean of its divisors is an integer number (49030272108).

Almost surely, 2^163434240355 is an apocalyptic number.

163434240355 is a deficient number, since it is larger than the sum of its proper divisors (32686848077).

163434240355 is an equidigital number, since it uses as much as digits as its factorization.

163434240355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32686848076.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 163434240355 in words is "one hundred sixty-three billion, four hundred thirty-four million, two hundred forty thousand, three hundred fifty-five".