255442420069 has 4 divisors (see below), whose sum is σ = 257785928620. Its totient is φ = 253098911520.

The previous prime is 255442420003. The next prime is 255442420073. The reversal of 255442420069 is 960024244552.

255442420069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213545652100 + 41896767969 = 462110^2 + 204687^2 .

It is a cyclic number.

It is not a de Polignac number, because 255442420069 - 2¹³ = 255442411877 is a prime.

It is a super-2 number, since 2×255442420069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255442420369) 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 3 ways as a sum of consecutive naturals, for example, 1171754112 + ... + 1171754329.

It is an arithmetic number, because the mean of its divisors is an integer number (64446482155).

Almost surely, 2^255442420069 is an apocalyptic number.

It is an amenable number.

255442420069 is a deficient number, since it is larger than the sum of its proper divisors (2343508551).

255442420069 is a wasteful number, since it uses less digits than its factorization.

255442420069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343508550.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 255442420069 in words is "two hundred fifty-five billion, four hundred forty-two million, four hundred twenty thousand, sixty-nine".