163625685 has 32 divisors (see below), whose sum is σ = 271728000. Its totient is φ = 83978496.

The previous prime is 163625617. The next prime is 163625687. The reversal of 163625685 is 586526361.

It is a happy number.

163625685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163625685 - 2⁹ = 163625173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163625687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221046 + ... + 221784.

It is an arithmetic number, because the mean of its divisors is an integer number (8491500).

Almost surely, 2^163625685 is an apocalyptic number.

163625685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163625685 is a deficient number, since it is larger than the sum of its proper divisors (108102315).

163625685 is a wasteful number, since it uses less digits than its factorization.

163625685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285.

The product of its digits is 259200, while the sum is 42.

The square root of 163625685 is about 12791.6255808244. The cubic root of 163625685 is about 546.9536093149.

The spelling of 163625685 in words is "one hundred sixty-three million, six hundred twenty-five thousand, six hundred eighty-five".