163656140 has 24 divisors (see below), whose sum is σ = 344282400. Its totient is φ = 65347328.

The previous prime is 163656121. The next prime is 163656149. The reversal of 163656140 is 41656361.

It is a junction number, because it is equal to n+sod(n) for n = 163656097 and 163656106.

It is not an unprimeable number, because it can be changed into a prime (163656149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4961 + ... + 18759.

It is an arithmetic number, because the mean of its divisors is an integer number (14345100).

Almost surely, 2^163656140 is an apocalyptic number.

163656140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163656140 is an abundant number, since it is smaller than the sum of its proper divisors (180626260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163656140 is a wasteful number, since it uses less digits than its factorization.

163656140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401 (or 14399 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 163656140 is about 12792.8159527135. The cubic root of 163656140 is about 546.9875413120.

The spelling of 163656140 in words is "one hundred sixty-three million, six hundred fifty-six thousand, one hundred forty".