4278260505257 has 2 divisors, whose sum is σ = 4278260505258. Its totient is φ = 4278260505256.

The previous prime is 4278260505247. The next prime is 4278260505263. The reversal of 4278260505257 is 7525050628724.

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., 2483788608016 + 1794471897241 = 1576004^2 + 1339579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4278260505257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4278260505199 and 4278260505208.

It is not a weakly prime, because it can be changed into another prime (4278260505227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139130252628 + 2139130252629.

It is an arithmetic number, because the mean of its divisors is an integer number (2139130252629).

Almost surely, 2^{4278260505257} is an apocalyptic number.

It is an amenable number.

4278260505257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278260505257 is an equidigital number, since it uses as much as digits as its factorization.

4278260505257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408000, while the sum is 53.

The spelling of 4278260505257 in words is "four trillion, two hundred seventy-eight billion, two hundred sixty million, five hundred five thousand, two hundred fifty-seven".