255606780 has 192 divisors, whose sum is σ = 868847616. Its totient is φ = 55353600.

The previous prime is 255606773. The next prime is 255606851. The reversal of 255606780 is 87606552.

It is a happy number.

It is a super-3 number, since 3×255606780³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a zygodrome in base 2.

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, 8245365 + ... + 8245395.

It is an arithmetic number, because the mean of its divisors is an integer number (4525248).

Almost surely, 2^255606780 is an apocalyptic number.

255606780 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 255606780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434423808).

255606780 is an abundant number, since it is smaller than the sum of its proper divisors (613240836).

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

255606780 is a wasteful number, since it uses less digits than its factorization.

255606780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 255606780 is about 15987.7071526845. The cubic root of 255606780 is about 634.6351511481.

The spelling of 255606780 in words is "two hundred fifty-five million, six hundred six thousand, seven hundred eighty".