26188479469 has 2 divisors, whose sum is σ = 26188479470. Its totient is φ = 26188479468.

The previous prime is 26188479463. The next prime is 26188479497. The reversal of 26188479469 is 96497488162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14152195369 + 12036284100 = 118963^2 + 109710^2 .

It is a cyclic number.

It is not a de Polignac number, because 26188479469 - 2³ = 26188479461 is a prime.

It is a super-2 number, since 2×26188479469² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26188479469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26188479461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13094239734 + 13094239735.

It is an arithmetic number, because the mean of its divisors is an integer number (13094239735).

Almost surely, 2^26188479469 is an apocalyptic number.

It is an amenable number.

26188479469 is a deficient number, since it is larger than the sum of its proper divisors (1).

26188479469 is an equidigital number, since it uses as much as digits as its factorization.

26188479469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 64.

The spelling of 26188479469 in words is "twenty-six billion, one hundred eighty-eight million, four hundred seventy-nine thousand, four hundred sixty-nine".