165244566643540 has 96 divisors (see below), whose sum is σ = 349885144667520. Its totient is φ = 65553334027776.

The previous prime is 165244566643511. The next prime is 165244566643573. The reversal of 165244566643540 is 45346665442561.

It is a super-2 number, since 2×165244566643540² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1568134294 + ... + 1568239666.

It is an arithmetic number, because the mean of its divisors is an integer number (3644636923620).

Almost surely, 2^{165244566643540} is an apocalyptic number.

165244566643540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165244566643540 is an abundant number, since it is smaller than the sum of its proper divisors (184640578023980).

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

165244566643540 is a wasteful number, since it uses less digits than its factorization.

165244566643540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106841 (or 106839 counting only the distinct ones).

The product of its (nonzero) digits is 248832000, while the sum is 61.

The spelling of 165244566643540 in words is "one hundred sixty-five trillion, two hundred forty-four billion, five hundred sixty-six million, six hundred forty-three thousand, five hundred forty".