255591135558 has 40 divisors (see below), whose sum is σ = 624778335720. Its totient is φ = 77451858720.

The previous prime is 255591135539. The next prime is 255591135559. The reversal of 255591135558 is 855531195552.

It is a happy number.

255591135558 is a `hidden beast` number, since 2 + 5 + 5 + 59 + 1 + 1 + 35 + 558 = 666.

255591135558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×255591135558³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255591135559) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 71712903 + ... + 71716466.

It is an arithmetic number, because the mean of its divisors is an integer number (15619458393).

Almost surely, 2^255591135558 is an apocalyptic number.

255591135558 is an abundant number, since it is smaller than the sum of its proper divisors (369187200162).

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

255591135558 is a wasteful number, since it uses less digits than its factorization.

255591135558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143429394 (or 143429385 counting only the distinct ones).

The product of its digits is 6750000, while the sum is 54.

The spelling of 255591135558 in words is "two hundred fifty-five billion, five hundred ninety-one million, one hundred thirty-five thousand, five hundred fifty-eight".