163641322385 has 8 divisors (see below), whose sum is σ = 202704089856. Its totient is φ = 126690055920.

The previous prime is 163641322381. The next prime is 163641322387. The reversal of 163641322385 is 583223146361.

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

It is not a de Polignac number, because 163641322385 - 2² = 163641322381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163641322381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527875079 + ... + 527875388.

It is an arithmetic number, because the mean of its divisors is an integer number (25338011232).

Almost surely, 2^163641322385 is an apocalyptic number.

It is an amenable number.

163641322385 is a deficient number, since it is larger than the sum of its proper divisors (39062767471).

163641322385 is a wasteful number, since it uses less digits than its factorization.

163641322385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055750503.

The product of its digits is 622080, while the sum is 44.

The spelling of 163641322385 in words is "one hundred sixty-three billion, six hundred forty-one million, three hundred twenty-two thousand, three hundred eighty-five".