26514678613 has 2 divisors, whose sum is σ = 26514678614. Its totient is φ = 26514678612.

The previous prime is 26514678611. The next prime is 26514678623. The reversal of 26514678613 is 31687641562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22849950244 + 3664728369 = 151162^2 + 60537^2 .

It is a cyclic number.

It is not a de Polignac number, because 26514678613 - 2¹ = 26514678611 is a prime.

Together with 26514678611, 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 (26514678611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13257339306 + 13257339307.

It is an arithmetic number, because the mean of its divisors is an integer number (13257339307).

Almost surely, 2^26514678613 is an apocalyptic number.

It is an amenable number.

26514678613 is a deficient number, since it is larger than the sum of its proper divisors (1).

26514678613 is an equidigital number, since it uses as much as digits as its factorization.

26514678613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The spelling of 26514678613 in words is "twenty-six billion, five hundred fourteen million, six hundred seventy-eight thousand, six hundred thirteen".