163220505305255 has 8 divisors (see below), whose sum is σ = 195919639994400. Its totient is φ = 130539715158816.

The previous prime is 163220505305237. The next prime is 163220505305261. The reversal of 163220505305255 is 552503505022361.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 163220505305255 - 2⁴² = 158822458794151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4586116100 + ... + 4586151689.

It is an arithmetic number, because the mean of its divisors is an integer number (24489954999300).

Almost surely, 2^{163220505305255} is an apocalyptic number.

163220505305255 is a deficient number, since it is larger than the sum of its proper divisors (32699134689145).

163220505305255 is an equidigital number, since it uses as much as digits as its factorization.

163220505305255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172271353.

The product of its (nonzero) digits is 1350000, while the sum is 44.

The spelling of 163220505305255 in words is "one hundred sixty-three trillion, two hundred twenty billion, five hundred five million, three hundred five thousand, two hundred fifty-five".