163500553431321 has 16 divisors (see below), whose sum is σ = 229898628210240. Its totient is φ = 103072632166080.

The previous prime is 163500553431307. The next prime is 163500553431433. The reversal of 163500553431321 is 123134355005361.

It is not a de Polignac number, because 163500553431321 - 2⁵ = 163500553431289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163500553431121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2651014230 + ... + 2651075903.

It is an arithmetic number, because the mean of its divisors is an integer number (14368664263140).

Almost surely, 2^{163500553431321} is an apocalyptic number.

It is an amenable number.

163500553431321 is a deficient number, since it is larger than the sum of its proper divisors (66398074778919).

163500553431321 is a wasteful number, since it uses less digits than its factorization.

163500553431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302090696.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 163500553431321 in words is "one hundred sixty-three trillion, five hundred billion, five hundred fifty-three million, four hundred thirty-one thousand, three hundred twenty-one".