163409856 has 28 divisors (see below), whose sum is σ = 432355752. Its totient is φ = 54469888.

The previous prime is 163409803. The next prime is 163409879. The reversal of 163409856 is 658904361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425355 + ... + 425738.

Almost surely, 2^163409856 is an apocalyptic number.

163409856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163409856 is an abundant number, since it is smaller than the sum of its proper divisors (268945896).

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

163409856 is an equidigital number, since it uses as much as digits as its factorization.

163409856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851108 (or 851098 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 163409856 is about 12783.1864572179. The cubic root of 163409856 is about 546.7130187414.

The spelling of 163409856 in words is "one hundred sixty-three million, four hundred nine thousand, eight hundred fifty-six".