405255314445493 has 4 divisors (see below), whose sum is σ = 405322532118540. Its totient is φ = 405188096772448.

The previous prime is 405255314445473. The next prime is 405255314445511. The reversal of 405255314445493 is 394544413552504.

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 242285630787729 + 162969683657764 = 15565527^2 + 12765958^2 .

It is a cyclic number.

It is not a de Polignac number, because 405255314445493 - 2²⁵ = 405255280891061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405255314445473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33608827480 + ... + 33608839537.

It is an arithmetic number, because the mean of its divisors is an integer number (101330633029635).

Almost surely, 2^{405255314445493} is an apocalyptic number.

It is an amenable number.

405255314445493 is a deficient number, since it is larger than the sum of its proper divisors (67217673047).

405255314445493 is an equidigital number, since it uses as much as digits as its factorization.

405255314445493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67217673046.

The product of its (nonzero) digits is 103680000, while the sum is 58.

Adding to 405255314445493 its reverse (394544413552504), we get a palindrome (799799727997997).

The spelling of 405255314445493 in words is "four hundred five trillion, two hundred fifty-five billion, three hundred fourteen million, four hundred forty-five thousand, four hundred ninety-three".