255636378 has 64 divisors (see below), whose sum is σ = 604247040. Its totient is φ = 79833600.

The previous prime is 255636377. The next prime is 255636379. The reversal of 255636378 is 873636552.

255636378 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 3 + 637 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (255636377) and next prime (255636379).

It is not an unprimeable number, because it can be changed into a prime (255636371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257463 + ... + 258453.

It is an arithmetic number, because the mean of its divisors is an integer number (9441360).

Almost surely, 2^255636378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255636378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302123520).

255636378 is an abundant number, since it is smaller than the sum of its proper divisors (348610662).

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

255636378 is a wasteful number, since it uses less digits than its factorization.

255636378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1294 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 255636378 is about 15988.6327745683. The cubic root of 255636378 is about 634.6596460725.

It can be divided in two parts, 25 and 5636378, that added together give a triangular number (5636403 = T₃₃₅₇).

The spelling of 255636378 in words is "two hundred fifty-five million, six hundred thirty-six thousand, three hundred seventy-eight".