163143843840 has 768 divisors, whose sum is σ = 604574530560. Its totient is φ = 40627077120.

The previous prime is 163143843839. The next prime is 163143843887. The reversal of 163143843840 is 48348341361.

163143843840 is a `hidden beast` number, since 1 + 631 + 4 + 3 + 8 + 4 + 3 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1965588439 + ... + 1965588521.

It is an arithmetic number, because the mean of its divisors is an integer number (787206420).

Almost surely, 2^163143843840 is an apocalyptic number.

163143843840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163143843840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302287265280).

163143843840 is an abundant number, since it is smaller than the sum of its proper divisors (441430686720).

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

163143843840 is an equidigital number, since it uses as much as digits as its factorization.

163143843840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 163143843840 in words is "one hundred sixty-three billion, one hundred forty-three million, eight hundred forty-three thousand, eight hundred forty".