163555444555361 has 24 divisors (see below), whose sum is σ = 170249133610080. Its totient is φ = 157111519933440.

The previous prime is 163555444555351. The next prime is 163555444555397.

163555444555361 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 163555444555361 - 2⁴⁶ = 93186700377697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163555444555294 and 163555444555303.

It is not an unprimeable number, because it can be changed into a prime (163555444555351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 735508385 + ... + 735730721.

It is an arithmetic number, because the mean of its divisors is an integer number (7093713900420).

Almost surely, 2^{163555444555361} is an apocalyptic number.

It is an amenable number.

163555444555361 is a deficient number, since it is larger than the sum of its proper divisors (6693689054719).

163555444555361 is a wasteful number, since it uses less digits than its factorization.

163555444555361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228045 (or 228014 counting only the distinct ones).

The product of its digits is 324000000, while the sum is 62.

The spelling of 163555444555361 in words is "one hundred sixty-three trillion, five hundred fifty-five billion, four hundred forty-four million, five hundred fifty-five thousand, three hundred sixty-one".