163644525446361 has 16 divisors (see below), whose sum is σ = 219418220757120. Its totient is φ = 108484079846400.

The previous prime is 163644525446357. The next prime is 163644525446393.

163644525446361 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 163644525446361 - 2² = 163644525446357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163644525446295 and 163644525446304.

It is not an unprimeable number, because it can be changed into a prime (163644525446321) 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, 59865565 + ... + 62539386.

It is an arithmetic number, because the mean of its divisors is an integer number (13713638797320).

Almost surely, 2^{163644525446361} is an apocalyptic number.

It is an amenable number.

163644525446361 is a deficient number, since it is larger than the sum of its proper divisors (55773695310759).

163644525446361 is a wasteful number, since it uses less digits than its factorization.

163644525446361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122407456.

The product of its digits is 149299200, while the sum is 60.

The spelling of 163644525446361 in words is "one hundred sixty-three trillion, six hundred forty-four billion, five hundred twenty-five million, four hundred forty-six thousand, three hundred sixty-one".