163330553454561 has 6 divisors (see below), whose sum is σ = 235921910545490. Its totient is φ = 108887035636368.

The previous prime is 163330553454527. The next prime is 163330553454569. The reversal of 163330553454561 is 165454355033361.

163330553454561 is a `hidden beast` number, since 1 + 6 + 3 + 3 + 3 + 0 + 5 + 5 + 34 + 545 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 142889891766336 + 20440661688225 = 11953656^2 + 4521135^2 .

It is not a de Polignac number, because 163330553454561 - 2⁷ = 163330553454433 is a prime.

It is a super-2 number, since 2×163330553454561² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163330553454498 and 163330553454507.

It is not an unprimeable number, because it can be changed into a prime (163330553454569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9073919636356 + ... + 9073919636373.

Almost surely, 2^{163330553454561} is an apocalyptic number.

It is an amenable number.

163330553454561 is a deficient number, since it is larger than the sum of its proper divisors (72591357090929).

163330553454561 is a wasteful number, since it uses less digits than its factorization.

163330553454561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18147839272735 (or 18147839272732 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 54.

The spelling of 163330553454561 in words is "one hundred sixty-three trillion, three hundred thirty billion, five hundred fifty-three million, four hundred fifty-four thousand, five hundred sixty-one".