255437420028 has 72 divisors (see below), whose sum is σ = 708081921792. Its totient is φ = 71429301216.

The previous prime is 255437419999. The next prime is 255437420053. The reversal of 255437420028 is 820024734552.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 4593826 + ... + 4649097.

It is an arithmetic number, because the mean of its divisors is an integer number (9834471136).

Almost surely, 2^255437420028 is an apocalyptic number.

255437420028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

255437420028 is an abundant number, since it is smaller than the sum of its proper divisors (452644501764).

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

255437420028 is a wasteful number, since it uses less digits than its factorization.

255437420028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9242991 (or 9242982 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 42.

The spelling of 255437420028 in words is "two hundred fifty-five billion, four hundred thirty-seven million, four hundred twenty thousand, twenty-eight".