26711607557 has 2 divisors, whose sum is σ = 26711607558. Its totient is φ = 26711607556.

The previous prime is 26711607547. The next prime is 26711607563. The reversal of 26711607557 is 75570611762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26650236001 + 61371556 = 163249^2 + 7834^2 .

It is a cyclic number.

It is not a de Polignac number, because 26711607557 - 2²⁰ = 26710558981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26711607547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13355803778 + 13355803779.

It is an arithmetic number, because the mean of its divisors is an integer number (13355803779).

Almost surely, 2^26711607557 is an apocalyptic number.

It is an amenable number.

26711607557 is a deficient number, since it is larger than the sum of its proper divisors (1).

26711607557 is an equidigital number, since it uses as much as digits as its factorization.

26711607557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 26711607557 in words is "twenty-six billion, seven hundred eleven million, six hundred seven thousand, five hundred fifty-seven".