26871870869 has 2 divisors, whose sum is σ = 26871870870. Its totient is φ = 26871870868.

The previous prime is 26871870859. The next prime is 26871870929. The reversal of 26871870869 is 96807817862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18510963025 + 8360907844 = 136055^2 + 91438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26871870869 is a prime.

It is a super-2 number, since 2×26871870869² (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 (26871870859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13435935434 + 13435935435.

It is an arithmetic number, because the mean of its divisors is an integer number (13435935435).

Almost surely, 2^26871870869 is an apocalyptic number.

It is an amenable number.

26871870869 is a deficient number, since it is larger than the sum of its proper divisors (1).

26871870869 is an equidigital number, since it uses as much as digits as its factorization.

26871870869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 26871870869 in words is "twenty-six billion, eight hundred seventy-one million, eight hundred seventy thousand, eight hundred sixty-nine".