28466951861 has 2 divisors, whose sum is σ = 28466951862. Its totient is φ = 28466951860.

The previous prime is 28466951827. The next prime is 28466951867. The reversal of 28466951861 is 16815966482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14799939025 + 13667012836 = 121655^2 + 116906^2 .

It is a cyclic number.

It is not a de Polignac number, because 28466951861 - 2¹⁸ = 28466689717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28466951797 and 28466951806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28466951867) 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, 14233475930 + 14233475931.

It is an arithmetic number, because the mean of its divisors is an integer number (14233475931).

Almost surely, 2^28466951861 is an apocalyptic number.

It is an amenable number.

28466951861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28466951861 is an equidigital number, since it uses as much as digits as its factorization.

28466951861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 56.

The spelling of 28466951861 in words is "twenty-eight billion, four hundred sixty-six million, nine hundred fifty-one thousand, eight hundred sixty-one".