163365440 has 56 divisors (see below), whose sum is σ = 444593472. Its totient is φ = 56010240.

The previous prime is 163365431. The next prime is 163365469. The reversal of 163365440 is 44563361.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 163365397 and 163365406.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34226 + ... + 38705.

Almost surely, 2^163365440 is an apocalyptic number.

163365440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163365440 is an abundant number, since it is smaller than the sum of its proper divisors (281228032).

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

163365440 is an equidigital number, since it uses as much as digits as its factorization.

163365440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72955 (or 72945 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 163365440 is about 12781.4490571296. The cubic root of 163365440 is about 546.6634807138.

The spelling of 163365440 in words is "one hundred sixty-three million, three hundred sixty-five thousand, four hundred forty".