163125644 has 12 divisors (see below), whose sum is σ = 311421768. Its totient is φ = 74148000.

The previous prime is 163125643. The next prime is 163125661. The reversal of 163125644 is 446521361.

It is a self number, because there is not a number n which added to its sum of digits gives 163125644.

It is not an unprimeable number, because it can be changed into a prime (163125643) 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 3 ways as a sum of consecutive naturals, for example, 1853657 + ... + 1853744.

It is an arithmetic number, because the mean of its divisors is an integer number (25951814).

Almost surely, 2^163125644 is an apocalyptic number.

It is an amenable number.

163125644 is a deficient number, since it is larger than the sum of its proper divisors (148296124).

163125644 is a wasteful number, since it uses less digits than its factorization.

163125644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707416 (or 3707414 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 163125644 is about 12772.0649857413. The cubic root of 163125644 is about 546.3958763632.

The spelling of 163125644 in words is "one hundred sixty-three million, one hundred twenty-five thousand, six hundred forty-four".