265555755220 has 96 divisors (see below), whose sum is σ = 640317097728. Its totient is φ = 90622374912.

The previous prime is 265555755217. The next prime is 265555755271. The reversal of 265555755220 is 22557555562.

265555755220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 33219544 + ... + 33227536.

It is an arithmetic number, because the mean of its divisors is an integer number (6669969768).

Almost surely, 2^265555755220 is an apocalyptic number.

265555755220 is a gapful number since it is divisible by the number (20) 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 265555755220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320158548864).

265555755220 is an abundant number, since it is smaller than the sum of its proper divisors (374761342508).

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

265555755220 is a wasteful number, since it uses less digits than its factorization.

265555755220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089 (or 9087 counting only the distinct ones).

The product of its (nonzero) digits is 5250000, while the sum is 49.

The spelling of 265555755220 in words is "two hundred sixty-five billion, five hundred fifty-five million, seven hundred fifty-five thousand, two hundred twenty".