255344640606 has 72 divisors (see below), whose sum is σ = 610264451160. Its totient is φ = 77103560160.

The previous prime is 255344640589. The next prime is 255344640623. The reversal of 255344640606 is 606046443552.

It is a happy number.

255344640606 is a `hidden beast` number, since 2 + 5 + 5 + 34 + 4 + 6 + 4 + 0 + 606 = 666.

It is an interprime number because it is at equal distance from previous prime (255344640589) and next prime (255344640623).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 409240 + ... + 823508.

It is an arithmetic number, because the mean of its divisors is an integer number (8475895155).

Almost surely, 2^255344640606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255344640606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305132225580).

255344640606 is an abundant number, since it is smaller than the sum of its proper divisors (354919810554).

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

255344640606 is a wasteful number, since it uses less digits than its factorization.

255344640606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414582 (or 414568 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 255344640606 in words is "two hundred fifty-five billion, three hundred forty-four million, six hundred forty thousand, six hundred six".