26171616281 has 2 divisors, whose sum is σ = 26171616282. Its totient is φ = 26171616280.

The previous prime is 26171616241. The next prime is 26171616307. The reversal of 26171616281 is 18261617162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22794960400 + 3376655881 = 150980^2 + 58109^2 .

It is a cyclic number.

It is not a de Polignac number, because 26171616281 - 2⁶ = 26171616217 is a prime.

It is a super-2 number, since 2×26171616281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26171616221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13085808140 + 13085808141.

It is an arithmetic number, because the mean of its divisors is an integer number (13085808141).

Almost surely, 2^26171616281 is an apocalyptic number.

It is an amenable number.

26171616281 is a deficient number, since it is larger than the sum of its proper divisors (1).

26171616281 is an equidigital number, since it uses as much as digits as its factorization.

26171616281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The spelling of 26171616281 in words is "twenty-six billion, one hundred seventy-one million, six hundred sixteen thousand, two hundred eighty-one".