255307782678 has 64 divisors (see below), whose sum is σ = 557806932480. Its totient is φ = 77427249408.

The previous prime is 255307782643. The next prime is 255307782679. The reversal of 255307782678 is 876287703552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255307782679) 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, 8771313 + ... + 8800371.

It is an arithmetic number, because the mean of its divisors is an integer number (8715733320).

Almost surely, 2^255307782678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255307782678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278903466240).

255307782678 is an abundant number, since it is smaller than the sum of its proper divisors (302499149802).

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

255307782678 is a wasteful number, since it uses less digits than its factorization.

255307782678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30693.

The product of its (nonzero) digits is 39513600, while the sum is 60.

The spelling of 255307782678 in words is "two hundred fifty-five billion, three hundred seven million, seven hundred eighty-two thousand, six hundred seventy-eight".