26814871811257 has 2 divisors, whose sum is σ = 26814871811258. Its totient is φ = 26814871811256.

The previous prime is 26814871811227. The next prime is 26814871811381. The reversal of 26814871811257 is 75211817841862.

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., 16001192022201 + 10813679789056 = 4000149^2 + 3288416^2 .

It is a cyclic number.

It is not a de Polignac number, because 26814871811257 - 2¹⁵ = 26814871778489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26814871811195 and 26814871811204.

It is not a weakly prime, because it can be changed into another prime (26814871811227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13407435905628 + 13407435905629.

It is an arithmetic number, because the mean of its divisors is an integer number (13407435905629).

Almost surely, 2^{26814871811257} is an apocalyptic number.

It is an amenable number.

26814871811257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26814871811257 is an equidigital number, since it uses as much as digits as its factorization.

26814871811257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12042240, while the sum is 61.

The spelling of 26814871811257 in words is "twenty-six trillion, eight hundred fourteen billion, eight hundred seventy-one million, eight hundred eleven thousand, two hundred fifty-seven".