26734134028681 has 2 divisors, whose sum is σ = 26734134028682. Its totient is φ = 26734134028680.

The previous prime is 26734134028549. The next prime is 26734134028733. The reversal of 26734134028681 is 18682043143762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26119816670025 + 614317358656 = 5110755^2 + 783784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26734134028681 is a prime.

It is a super-2 number, since 2×26734134028681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26734134728681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13367067014340 + 13367067014341.

It is an arithmetic number, because the mean of its divisors is an integer number (13367067014341).

Almost surely, 2^{26734134028681} is an apocalyptic number.

It is an amenable number.

26734134028681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26734134028681 is an equidigital number, since it uses as much as digits as its factorization.

26734134028681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 26734134028681 in words is "twenty-six trillion, seven hundred thirty-four billion, one hundred thirty-four million, twenty-eight thousand, six hundred eighty-one".