26621536321111 has 2 divisors, whose sum is σ = 26621536321112. Its totient is φ = 26621536321110.

The previous prime is 26621536321109. The next prime is 26621536321139. The reversal of 26621536321111 is 11112363512662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26621536321111 - 2¹ = 26621536321109 is a prime.

It is a super-2 number, since 2×26621536321111² (a number of 28 digits) contains 22 as substring.

Together with 26621536321109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26621536321811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13310768160555 + 13310768160556.

It is an arithmetic number, because the mean of its divisors is an integer number (13310768160556).

Almost surely, 2^{26621536321111} is an apocalyptic number.

26621536321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

26621536321111 is an equidigital number, since it uses as much as digits as its factorization.

26621536321111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

Adding to 26621536321111 its reverse (11112363512662), we get a palindrome (37733899833773).

The spelling of 26621536321111 in words is "twenty-six trillion, six hundred twenty-one billion, five hundred thirty-six million, three hundred twenty-one thousand, one hundred eleven".