26717117045761 has 4 divisors (see below), whose sum is σ = 26757536285524. Its totient is φ = 26676697806000.

The previous prime is 26717117045701. The next prime is 26717117045783. The reversal of 26717117045761 is 16754071171762.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22523386466161 + 4193730579600 = 4745881^2 + 2047860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26717117045761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26717117045701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20209618890 + ... + 20209620211.

It is an arithmetic number, because the mean of its divisors is an integer number (6689384071381).

Almost surely, 2^{26717117045761} is an apocalyptic number.

It is an amenable number.

26717117045761 is a deficient number, since it is larger than the sum of its proper divisors (40419239763).

26717117045761 is an equidigital number, since it uses as much as digits as its factorization.

26717117045761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40419239762.

The product of its (nonzero) digits is 3457440, while the sum is 55.

The spelling of 26717117045761 in words is "twenty-six trillion, seven hundred seventeen billion, one hundred seventeen million, forty-five thousand, seven hundred sixty-one".