255878256064340 has 192 divisors, whose sum is σ = 682422405815808. Its totient is φ = 78429407846400.

The previous prime is 255878256064337. The next prime is 255878256064451. The reversal of 255878256064340 is 43460652878552.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2291966 + ... + 22737845.

It is an arithmetic number, because the mean of its divisors is an integer number (3554283363624).

Almost surely, 2^{255878256064340} is an apocalyptic number.

255878256064340 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 255878256064340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341211202907904).

255878256064340 is an abundant number, since it is smaller than the sum of its proper divisors (426544149751468).

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

255878256064340 is a wasteful number, since it uses less digits than its factorization.

255878256064340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25030018 (or 25030016 counting only the distinct ones).

The product of its (nonzero) digits is 387072000, while the sum is 65.

The spelling of 255878256064340 in words is "two hundred fifty-five trillion, eight hundred seventy-eight billion, two hundred fifty-six million, sixty-four thousand, three hundred forty".