281479271678257 has 2 divisors, whose sum is σ = 281479271678258. Its totient is φ = 281479271678256.

The previous prime is 281479271678191. The next prime is 281479271678291. The reversal of 281479271678257 is 752876172974182.

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., 229785458072976 + 51693813605281 = 15158676^2 + 7189841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281479271678257 is a prime.

It is not a weakly prime, because it can be changed into another prime (281479271678057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140739635839128 + 140739635839129.

It is an arithmetic number, because the mean of its divisors is an integer number (140739635839129).

Almost surely, 2^{281479271678257} is an apocalyptic number.

It is an amenable number.

281479271678257 is a deficient number, since it is larger than the sum of its proper divisors (1).

281479271678257 is an equidigital number, since it uses as much as digits as its factorization.

281479271678257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327656960, while the sum is 76.

The spelling of 281479271678257 in words is "two hundred eighty-one trillion, four hundred seventy-nine billion, two hundred seventy-one million, six hundred seventy-eight thousand, two hundred fifty-seven".