255881155333440 has 1008 divisors, whose sum is σ = 1025876769224832. Its totient is φ = 53560944009216.

The previous prime is 255881155333423. The next prime is 255881155333469. The reversal of 255881155333440 is 44333551188552.

It is a happy number.

255881155333440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9863193109 + ... + 9863219051.

It is an arithmetic number, because the mean of its divisors is an integer number (1017734890104).

Almost surely, 2^{255881155333440} is an apocalyptic number.

255881155333440 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 255881155333440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512938384612416).

255881155333440 is an abundant number, since it is smaller than the sum of its proper divisors (769995613891392).

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

255881155333440 is a wasteful number, since it uses less digits than its factorization.

255881155333440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26244 (or 26100 counting only the distinct ones).

The product of its (nonzero) digits is 34560000, while the sum is 57.

The spelling of 255881155333440 in words is "two hundred fifty-five trillion, eight hundred eighty-one billion, one hundred fifty-five million, three hundred thirty-three thousand, four hundred forty".