28178210244361 has 2 divisors, whose sum is σ = 28178210244362. Its totient is φ = 28178210244360.

The previous prime is 28178210244287. The next prime is 28178210244407. The reversal of 28178210244361 is 16344201287182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23311090360336 + 4867119884025 = 4828156^2 + 2206155^2 .

It is a cyclic number.

It is not a de Polignac number, because 28178210244361 - 2¹¹ = 28178210242313 is a prime.

It is a super-2 number, since 2×28178210244361² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28178210244461) 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, 14089105122180 + 14089105122181.

It is an arithmetic number, because the mean of its divisors is an integer number (14089105122181).

Almost surely, 2^{28178210244361} is an apocalyptic number.

It is an amenable number.

28178210244361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28178210244361 is an equidigital number, since it uses as much as digits as its factorization.

28178210244361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 28178210244361 in words is "twenty-eight trillion, one hundred seventy-eight billion, two hundred ten million, two hundred forty-four thousand, three hundred sixty-one".