165500840340 has 108 divisors (see below), whose sum is σ = 551806317972. Its totient is φ = 40121410560.

The previous prime is 165500840303. The next prime is 165500840357. The reversal of 165500840340 is 43048005561.

It is a happy number.

165500840340 is a `hidden beast` number, since 165 + 50 + 0 + 8 + 403 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 115352612496 + 50148227844 = 339636^2 + 223938^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 165500840295 and 165500840304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3777597 + ... + 3821156.

It is an arithmetic number, because the mean of its divisors is an integer number (5109317759).

Almost surely, 2^165500840340 is an apocalyptic number.

165500840340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165500840340 is an abundant number, since it is smaller than the sum of its proper divisors (386305477632).

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

165500840340 is a wasteful number, since it uses less digits than its factorization.

165500840340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7598790 (or 7598774 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 165500840340 in words is "one hundred sixty-five billion, five hundred million, eight hundred forty thousand, three hundred forty".