26538247643 has 2 divisors, whose sum is σ = 26538247644. Its totient is φ = 26538247642.

The previous prime is 26538247621. The next prime is 26538247667. The reversal of 26538247643 is 34674283562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26538247643 - 2²⁶ = 26471138779 is a prime.

It is a super-2 number, since 2×26538247643² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 26538247591 and 26538247600.

It is not a weakly prime, because it can be changed into another prime (26538244643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13269123821 + 13269123822.

It is an arithmetic number, because the mean of its divisors is an integer number (13269123822).

Almost surely, 2^26538247643 is an apocalyptic number.

26538247643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26538247643 is an equidigital number, since it uses as much as digits as its factorization.

26538247643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 50.

The spelling of 26538247643 in words is "twenty-six billion, five hundred thirty-eight million, two hundred forty-seven thousand, six hundred forty-three".