26910270857 has 2 divisors, whose sum is σ = 26910270858. Its totient is φ = 26910270856.

The previous prime is 26910270839. The next prime is 26910270899. The reversal of 26910270857 is 75807201962.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18418832656 + 8491438201 = 135716^2 + 92149^2 .

It is a cyclic number.

It is not a de Polignac number, because 26910270857 - 2⁸ = 26910270601 is a prime.

It is not a weakly prime, because it can be changed into another prime (26910240857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13455135428 + 13455135429.

It is an arithmetic number, because the mean of its divisors is an integer number (13455135429).

Almost surely, 2^26910270857 is an apocalyptic number.

It is an amenable number.

26910270857 is a deficient number, since it is larger than the sum of its proper divisors (1).

26910270857 is an equidigital number, since it uses as much as digits as its factorization.

26910270857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 26910270857 in words is "twenty-six billion, nine hundred ten million, two hundred seventy thousand, eight hundred fifty-seven".