255504434322440 has 32 divisors (see below), whose sum is σ = 574958183710680. Its totient is φ = 102188759242752.

The previous prime is 255504434322413. The next prime is 255504434322463. The reversal of 255504434322440 is 44223434405552.

It can be written as a sum of positive squares in 4 ways, for example, as 136823411699716 + 118681022622724 = 11697154^2 + 10894082^2 .

It is a super-3 number, since 3×255504434322440³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406384649 + ... + 407012888.

Almost surely, 2^{255504434322440} is an apocalyptic number.

255504434322440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255504434322440 is an abundant number, since it is smaller than the sum of its proper divisors (319453749388240).

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

255504434322440 is a wasteful number, since it uses less digits than its factorization.

255504434322440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813405401 (or 813405397 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 47.

Adding to 255504434322440 its reverse (44223434405552), we get a palindrome (299727868727992).

The spelling of 255504434322440 in words is "two hundred fifty-five trillion, five hundred four billion, four hundred thirty-four million, three hundred twenty-two thousand, four hundred forty".