7279280717857 has 2 divisors, whose sum is σ = 7279280717858. Its totient is φ = 7279280717856.

The previous prime is 7279280717803. The next prime is 7279280717869. The reversal of 7279280717857 is 7587170829727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5369235099921 + 1910045617936 = 2317161^2 + 1382044^2 .

It is a cyclic number.

It is not a de Polignac number, because 7279280717857 - 2⁷ = 7279280717729 is a prime.

It is not a weakly prime, because it can be changed into another prime (7279280712857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3639640358928 + 3639640358929.

It is an arithmetic number, because the mean of its divisors is an integer number (3639640358929).

Almost surely, 2^{7279280717857} is an apocalyptic number.

It is an amenable number.

7279280717857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7279280717857 is an equidigital number, since it uses as much as digits as its factorization.

7279280717857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193616640, while the sum is 70.

The spelling of 7279280717857 in words is "seven trillion, two hundred seventy-nine billion, two hundred eighty million, seven hundred seventeen thousand, eight hundred fifty-seven".