165509259240 has 64 divisors (see below), whose sum is σ = 534722227200. Its totient is φ = 40740740352.

The previous prime is 165509259211. The next prime is 165509259269. The reversal of 165509259240 is 42952905561.

It is an interprime number because it is at equal distance from previous prime (165509259211) and next prime (165509259269).

It is a self number, because there is not a number n which added to its sum of digits gives 165509259240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53046280 + ... + 53049399.

It is an arithmetic number, because the mean of its divisors is an integer number (8355034800).

Almost surely, 2^165509259240 is an apocalyptic number.

165509259240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165509259240 is an abundant number, since it is smaller than the sum of its proper divisors (369212967960).

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

165509259240 is a wasteful number, since it uses less digits than its factorization.

165509259240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106095706 (or 106095702 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 165509259240 in words is "one hundred sixty-five billion, five hundred nine million, two hundred fifty-nine thousand, two hundred forty".