165535997253060 has 48 divisors (see below), whose sum is σ = 529715191211136. Its totient is φ = 37836799372032.

The previous prime is 165535997253059. The next prime is 165535997253073. The reversal of 165535997253060 is 60352799535561.

It is a junction number, because it is equal to n+sod(n) for n = 165535997252982 and 165535997253000.

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, 197066662977 + ... + 197066663816.

It is an arithmetic number, because the mean of its divisors is an integer number (11035733150232).

Almost surely, 2^{165535997253060} is an apocalyptic number.

165535997253060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165535997253060 is an abundant number, since it is smaller than the sum of its proper divisors (364179193958076).

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

165535997253060 is a wasteful number, since it uses less digits than its factorization.

165535997253060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394133326812 (or 394133326810 counting only the distinct ones).

The product of its (nonzero) digits is 229635000, while the sum is 66.

The spelling of 165535997253060 in words is "one hundred sixty-five trillion, five hundred thirty-five billion, nine hundred ninety-seven million, two hundred fifty-three thousand, sixty".