26021317566539 has 2 divisors, whose sum is σ = 26021317566540. Its totient is φ = 26021317566538.

The previous prime is 26021317566397. The next prime is 26021317566593. The reversal of 26021317566539 is 93566571312062.

Together with next prime (26021317566593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26021317566539 is a prime.

It is a super-2 number, since 2×26021317566539² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26021317563539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13010658783269 + 13010658783270.

It is an arithmetic number, because the mean of its divisors is an integer number (13010658783270).

Almost surely, 2^{26021317566539} is an apocalyptic number.

26021317566539 is a deficient number, since it is larger than the sum of its proper divisors (1).

26021317566539 is an equidigital number, since it uses as much as digits as its factorization.

26021317566539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 56.

The spelling of 26021317566539 in words is "twenty-six trillion, twenty-one billion, three hundred seventeen million, five hundred sixty-six thousand, five hundred thirty-nine".