28211149759069 has 2 divisors, whose sum is σ = 28211149759070. Its totient is φ = 28211149759068.

The previous prime is 28211149759063. The next prime is 28211149759109. The reversal of 28211149759069 is 96095794111282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28210566295044 + 583464025 = 5311362^2 + 24155^2 .

It is a cyclic number.

It is not a de Polignac number, because 28211149759069 - 2³ = 28211149759061 is a prime.

It is a super-2 number, since 2×28211149759069² (a number of 28 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 28211149759069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28211149759061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14105574879534 + 14105574879535.

It is an arithmetic number, because the mean of its divisors is an integer number (14105574879535).

Almost surely, 2^{28211149759069} is an apocalyptic number.

It is an amenable number.

28211149759069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28211149759069 is an equidigital number, since it uses as much as digits as its factorization.

28211149759069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 64.

The spelling of 28211149759069 in words is "twenty-eight trillion, two hundred eleven billion, one hundred forty-nine million, seven hundred fifty-nine thousand, sixty-nine".