165555744256 has 80 divisors (see below), whose sum is σ = 397940780160. Its totient is φ = 67218094080.

The previous prime is 165555744253. The next prime is 165555744271. The reversal of 165555744256 is 652447555561.

165555744256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165555744197 and 165555744206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165555744253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147510 + ... + 1283701.

It is an arithmetic number, because the mean of its divisors is an integer number (4974259752).

Almost surely, 2^165555744256 is an apocalyptic number.

165555744256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165555744256 is an abundant number, since it is smaller than the sum of its proper divisors (232385035904).

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

165555744256 is an equidigital number, since it uses as much as digits as its factorization.

165555744256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431255 (or 2431239 counting only the distinct ones).

The product of its digits is 25200000, while the sum is 55.

The spelling of 165555744256 in words is "one hundred sixty-five billion, five hundred fifty-five million, seven hundred forty-four thousand, two hundred fifty-six".