163878125 has 18 divisors (see below), whose sum is σ = 205732926. Its totient is φ = 130530000.

The previous prime is 163878109. The next prime is 163878131. The reversal of 163878125 is 521878361.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

163878125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 117896164 + 45981961 = 10858^2 + 6781^2 .

It is not a de Polignac number, because 163878125 - 2⁴ = 163878109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 715511 + ... + 715739.

It is an arithmetic number, because the mean of its divisors is an integer number (11429607).

Almost surely, 2^163878125 is an apocalyptic number.

It is an amenable number.

163878125 is a deficient number, since it is larger than the sum of its proper divisors (41854801).

163878125 is an frugal number, since it uses more digits than its factorization.

163878125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 234 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 163878125 is about 12801.4891711863. The cubic root of 163878125 is about 547.2347428955.

The spelling of 163878125 in words is "one hundred sixty-three million, eight hundred seventy-eight thousand, one hundred twenty-five".