255534370440 has 128 divisors (see below), whose sum is σ = 790146213120. Its totient is φ = 66081254400.

The previous prime is 255534370433. The next prime is 255534370447. The reversal of 255534370440 is 44073435552.

255534370440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (255534370433) and next prime (255534370447).

It is a junction number, because it is equal to n+sod(n) for n = 255534370392 and 255534370401.

It is not an unprimeable number, because it can be changed into a prime (255534370447) by changing a digit.

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, 273882 + ... + 765558.

It is an arithmetic number, because the mean of its divisors is an integer number (6173017290).

Almost surely, 2^255534370440 is an apocalyptic number.

255534370440 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 255534370440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395073106560).

255534370440 is an abundant number, since it is smaller than the sum of its proper divisors (534611842680).

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

255534370440 is a wasteful number, since it uses less digits than its factorization.

255534370440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491823 (or 491819 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 42.

The spelling of 255534370440 in words is "two hundred fifty-five billion, five hundred thirty-four million, three hundred seventy thousand, four hundred forty".