165435869659040 has 24 divisors (see below), whose sum is σ = 390842242069860. Its totient is φ = 66174347863552.

The previous prime is 165435869659031. The next prime is 165435869659061. The reversal of 165435869659040 is 40956968534561.

165435869659040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163430349184144 + 2005520474896 = 12783988^2 + 1416164^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516987092525 + ... + 516987092844.

Almost surely, 2^{165435869659040} is an apocalyptic number.

165435869659040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165435869659040 is an abundant number, since it is smaller than the sum of its proper divisors (225406372410820).

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

165435869659040 is a wasteful number, since it uses less digits than its factorization.

165435869659040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033974185384 (or 1033974185376 counting only the distinct ones).

The product of its (nonzero) digits is 839808000, while the sum is 71.

The spelling of 165435869659040 in words is "one hundred sixty-five trillion, four hundred thirty-five billion, eight hundred sixty-nine million, six hundred fifty-nine thousand, forty".