165140540 has 24 divisors (see below), whose sum is σ = 347557392. Its totient is φ = 65911040.

The previous prime is 165140539. The next prime is 165140543. The reversal of 165140540 is 45041561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165140543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500 + ... + 18180.

It is an arithmetic number, because the mean of its divisors is an integer number (14481558).

Almost surely, 2^165140540 is an apocalyptic number.

165140540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165140540 is an abundant number, since it is smaller than the sum of its proper divisors (182416852).

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

165140540 is a wasteful number, since it uses less digits than its factorization.

165140540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18157 (or 18155 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165140540 is about 12850.7019263541. The cubic root of 165140540 is about 548.6363352355.

The spelling of 165140540 in words is "one hundred sixty-five million, one hundred forty thousand, five hundred forty".