4278255717805 has 4 divisors (see below), whose sum is σ = 5133906861372. Its totient is φ = 3422604574240.

The previous prime is 4278255717751. The next prime is 4278255717863. The reversal of 4278255717805 is 5087175528724.

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 2042115308676 + 2236140409129 = 1429026^2 + 1495373^2 .

It is not a de Polignac number, because 4278255717805 - 2¹¹ = 4278255715757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427825571776 + ... + 427825571785.

It is an arithmetic number, because the mean of its divisors is an integer number (1283476715343).

Almost surely, 2^{4278255717805} is an apocalyptic number.

It is an amenable number.

4278255717805 is a deficient number, since it is larger than the sum of its proper divisors (855651143567).

4278255717805 is an equidigital number, since it uses as much as digits as its factorization.

4278255717805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855651143566.

The product of its (nonzero) digits is 43904000, while the sum is 61.

The spelling of 4278255717805 in words is "four trillion, two hundred seventy-eight billion, two hundred fifty-five million, seven hundred seventeen thousand, eight hundred five".