12087475778689 has 2 divisors, whose sum is σ = 12087475778690. Its totient is φ = 12087475778688.

The previous prime is 12087475778681. The next prime is 12087475778731. The reversal of 12087475778689 is 98687757478021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10683961688689 + 1403514090000 = 3268633^2 + 1184700^2 .

It is a cyclic number.

It is not a de Polignac number, because 12087475778689 - 2³ = 12087475778681 is a prime.

It is a super-2 number, since 2×12087475778689² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12087475778681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6043737889344 + 6043737889345.

It is an arithmetic number, because the mean of its divisors is an integer number (6043737889345).

Almost surely, 2^{12087475778689} is an apocalyptic number.

It is an amenable number.

12087475778689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12087475778689 is an equidigital number, since it uses as much as digits as its factorization.

12087475778689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2655313920, while the sum is 79.

The spelling of 12087475778689 in words is "twelve trillion, eighty-seven billion, four hundred seventy-five million, seven hundred seventy-eight thousand, six hundred eighty-nine".