26365700681 has 2 divisors, whose sum is σ = 26365700682. Its totient is φ = 26365700680.

The previous prime is 26365700657. The next prime is 26365700693. The reversal of 26365700681 is 18600756362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19069124281 + 7296576400 = 138091^2 + 85420^2 .

It is a cyclic number.

It is not a de Polignac number, because 26365700681 - 2¹⁴ = 26365684297 is a prime.

It is a super-2 number, since 2×26365700681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26365700651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13182850340 + 13182850341.

It is an arithmetic number, because the mean of its divisors is an integer number (13182850341).

Almost surely, 2^26365700681 is an apocalyptic number.

It is an amenable number.

26365700681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26365700681 is an equidigital number, since it uses as much as digits as its factorization.

26365700681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 26365700681 in words is "twenty-six billion, three hundred sixty-five million, seven hundred thousand, six hundred eighty-one".