165236713272640 has 112 divisors (see below), whose sum is σ = 399949312855680. Its totient is φ = 65006441441280.

The previous prime is 165236713272623. The next prime is 165236713272691. The reversal of 165236713272640 is 46272317632561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274599621 + ... + 275200699.

It is an arithmetic number, because the mean of its divisors is an integer number (3570976007640).

Almost surely, 2^{165236713272640} is an apocalyptic number.

165236713272640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165236713272640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199974656427840).

165236713272640 is an abundant number, since it is smaller than the sum of its proper divisors (234712599583040).

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

165236713272640 is a wasteful number, since it uses less digits than its factorization.

165236713272640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615240 (or 615230 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 165236713272640 in words is "one hundred sixty-five trillion, two hundred thirty-six billion, seven hundred thirteen million, two hundred seventy-two thousand, six hundred forty".