255355423031405 has 8 divisors (see below), whose sum is σ = 306438351278712. Its totient is φ = 204276442664448.

The previous prime is 255355423031399. The next prime is 255355423031447. The reversal of 255355423031405 is 504130324553552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30844816623721 + 224510606407684 = 5553811^2 + 14983678^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255355423031405 - 2¹⁰ = 255355423030381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255355423031405.

It is a congruent number.

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, 986827784 + ... + 987086513.

It is an arithmetic number, because the mean of its divisors is an integer number (38304793909839).

Almost surely, 2^{255355423031405} is an apocalyptic number.

It is an amenable number.

255355423031405 is a deficient number, since it is larger than the sum of its proper divisors (51082928247307).

255355423031405 is a wasteful number, since it uses less digits than its factorization.

255355423031405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973940175.

The product of its (nonzero) digits is 5400000, while the sum is 47.

Adding to 255355423031405 its reverse (504130324553552), we get a palindrome (759485747584957).

The spelling of 255355423031405 in words is "two hundred fifty-five trillion, three hundred fifty-five billion, four hundred twenty-three million, thirty-one thousand, four hundred five".