255844645420 has 96 divisors (see below), whose sum is σ = 662484848256. Its totient is φ = 80820633600.

The previous prime is 255844645417. The next prime is 255844645429. The reversal of 255844645420 is 24546448552.

It is not an unprimeable number, because it can be changed into a prime (255844645429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854700 + ... + 1114540.

It is an arithmetic number, because the mean of its divisors is an integer number (6900883836).

Almost surely, 2^255844645420 is an apocalyptic number.

255844645420 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 255844645420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331242424128).

255844645420 is an abundant number, since it is smaller than the sum of its proper divisors (406640202836).

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

255844645420 is a wasteful number, since it uses less digits than its factorization.

255844645420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260411 (or 260409 counting only the distinct ones).

The product of its (nonzero) digits is 6144000, while the sum is 49.

The spelling of 255844645420 in words is "two hundred fifty-five billion, eight hundred forty-four million, six hundred forty-five thousand, four hundred twenty".