26438079617 has 2 divisors, whose sum is σ = 26438079618. Its totient is φ = 26438079616.

The previous prime is 26438079611. The next prime is 26438079659. The reversal of 26438079617 is 71697083462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25951921216 + 486158401 = 161096^2 + 22049^2 .

It is a cyclic number.

It is not a de Polignac number, because 26438079617 - 2⁶ = 26438079553 is a prime.

It is not a weakly prime, because it can be changed into another prime (26438079611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13219039808 + 13219039809.

It is an arithmetic number, because the mean of its divisors is an integer number (13219039809).

Almost surely, 2^26438079617 is an apocalyptic number.

It is an amenable number.

26438079617 is a deficient number, since it is larger than the sum of its proper divisors (1).

26438079617 is an equidigital number, since it uses as much as digits as its factorization.

26438079617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 26438079617 in words is "twenty-six billion, four hundred thirty-eight million, seventy-nine thousand, six hundred seventeen".