165163140 has 36 divisors (see below), whose sum is σ = 500995404. Its totient is φ = 44043456.

The previous prime is 165163139. The next prime is 165163147. The reversal of 165163140 is 41361561.

165163140 is a `hidden beast` number, since 1 + 6 + 516 + 3 + 140 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 67864644 + 97298496 = 8238^2 + 9864^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (165163147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 458607 + ... + 458966.

It is an arithmetic number, because the mean of its divisors is an integer number (13916539).

Almost surely, 2^165163140 is an apocalyptic number.

165163140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165163140 is an abundant number, since it is smaller than the sum of its proper divisors (335832264).

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

165163140 is a wasteful number, since it uses less digits than its factorization.

165163140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917588 (or 917583 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 165163140 is about 12851.5812256702. The cubic root of 165163140 is about 548.6613616274.

The spelling of 165163140 in words is "one hundred sixty-five million, one hundred sixty-three thousand, one hundred forty".