163153440 has 120 divisors (see below), whose sum is σ = 575841420. Its totient is φ = 43504128.

The previous prime is 163153433. The next prime is 163153447. The reversal of 163153440 is 44351361.

163153440 is a `hidden beast` number, since 1 + 6 + 315 + 344 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (163153433) and next prime (163153447).

It can be written as a sum of positive squares in 2 ways, for example, as 147185424 + 15968016 = 12132^2 + 3996^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (163153447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6666 + ... + 19254.

Almost surely, 2^163153440 is an apocalyptic number.

163153440 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 163153440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287920710).

163153440 is an abundant number, since it is smaller than the sum of its proper divisors (412687980).

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

163153440 is a wasteful number, since it uses less digits than its factorization.

163153440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12616 (or 12599 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 163153440 is about 12773.1530954577. The cubic root of 163153440 is about 546.4269092057.

The spelling of 163153440 in words is "one hundred sixty-three million, one hundred fifty-three thousand, four hundred forty".