12851395861 has 2 divisors, whose sum is σ = 12851395862. Its totient is φ = 12851395860.

The previous prime is 12851395831. The next prime is 12851395891. The reversal of 12851395861 is 16859315821.

12851395861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12851395831) and next prime (12851395891).

It can be written as a sum of positive squares in only one way, i.e., 6488302500 + 6363093361 = 80550^2 + 79769^2 .

It is a cyclic number.

It is not a de Polignac number, because 12851395861 - 2¹³ = 12851387669 is a prime.

It is a super-2 number, since 2×12851395861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12851395801) 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, 6425697930 + 6425697931.

It is an arithmetic number, because the mean of its divisors is an integer number (6425697931).

Almost surely, 2^12851395861 is an apocalyptic number.

It is an amenable number.

12851395861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12851395861 is an equidigital number, since it uses as much as digits as its factorization.

12851395861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 49.

The spelling of 12851395861 in words is "twelve billion, eight hundred fifty-one million, three hundred ninety-five thousand, eight hundred sixty-one".