26619427669 has 2 divisors, whose sum is σ = 26619427670. Its totient is φ = 26619427668.

The previous prime is 26619427661. The next prime is 26619427687. The reversal of 26619427669 is 96672491662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26215819569 + 403608100 = 161913^2 + 20090^2 .

It is a cyclic number.

It is not a de Polignac number, because 26619427669 - 2³ = 26619427661 is a prime.

It is a super-2 number, since 2×26619427669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26619427661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13309713834 + 13309713835.

It is an arithmetic number, because the mean of its divisors is an integer number (13309713835).

Almost surely, 2^26619427669 is an apocalyptic number.

It is an amenable number.

26619427669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26619427669 is an equidigital number, since it uses as much as digits as its factorization.

26619427669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 58.

The spelling of 26619427669 in words is "twenty-six billion, six hundred nineteen million, four hundred twenty-seven thousand, six hundred sixty-nine".