255525278028 has 12 divisors (see below), whose sum is σ = 596225648760. Its totient is φ = 85175092672.

The previous prime is 255525278011. The next prime is 255525278039. The reversal of 255525278028 is 820872525552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×255525278028² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10646886573 + ... + 10646886596.

It is an arithmetic number, because the mean of its divisors is an integer number (49685470730).

Almost surely, 2^255525278028 is an apocalyptic number.

It is an amenable number.

255525278028 is an abundant number, since it is smaller than the sum of its proper divisors (340700370732).

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

255525278028 is a wasteful number, since it uses less digits than its factorization.

255525278028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21293773176 (or 21293773174 counting only the distinct ones).

The product of its (nonzero) digits is 4480000, while the sum is 51.

The spelling of 255525278028 in words is "two hundred fifty-five billion, five hundred twenty-five million, two hundred seventy-eight thousand, twenty-eight".