163925641 has 8 divisors (see below), whose sum is σ = 179496000. Its totient is φ = 148466640.

The previous prime is 163925639. The next prime is 163925681. The reversal of 163925641 is 146529361.

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

It is a cyclic number.

It is not a de Polignac number, because 163925641 - 2¹ = 163925639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163925641.

It is not an unprimeable number, because it can be changed into a prime (163925621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24741 + ... + 30658.

It is an arithmetic number, because the mean of its divisors is an integer number (22437000).

Almost surely, 2^163925641 is an apocalyptic number.

163925641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163925641 is a deficient number, since it is larger than the sum of its proper divisors (15570359).

163925641 is a wasteful number, since it uses less digits than its factorization.

163925641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55679.

The product of its digits is 38880, while the sum is 37.

The square root of 163925641 is about 12803.3449145136. The cubic root of 163925641 is about 547.2876275078.

The spelling of 163925641 in words is "one hundred sixty-three million, nine hundred twenty-five thousand, six hundred forty-one".