4278255718157 has 2 divisors, whose sum is σ = 4278255718158. Its totient is φ = 4278255718156.

The previous prime is 4278255718091. The next prime is 4278255718169. The reversal of 4278255718157 is 7518175528724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4198446078121 + 79809640036 = 2049011^2 + 282506^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278255718157 - 2¹⁰ = 4278255717133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4278255718157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278255718057) by changing a digit.

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 as a sum of consecutive naturals, namely, 2139127859078 + 2139127859079.

It is an arithmetic number, because the mean of its divisors is an integer number (2139127859079).

Almost surely, 2^{4278255718157} is an apocalyptic number.

It is an amenable number.

4278255718157 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278255718157 is an equidigital number, since it uses as much as digits as its factorization.

4278255718157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904000, while the sum is 62.

The spelling of 4278255718157 in words is "four trillion, two hundred seventy-eight billion, two hundred fifty-five million, seven hundred eighteen thousand, one hundred fifty-seven".