8481857437 has 2 divisors, whose sum is σ = 8481857438. Its totient is φ = 8481857436.

The previous prime is 8481857387. The next prime is 8481857443. The reversal of 8481857437 is 7347581848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7806429316 + 675428121 = 88354^2 + 25989^2 .

It is a cyclic number.

It is not a de Polignac number, because 8481857437 - 2¹⁹ = 8481333149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8481807437) 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, 4240928718 + 4240928719.

It is an arithmetic number, because the mean of its divisors is an integer number (4240928719).

Almost surely, 2^8481857437 is an apocalyptic number.

It is an amenable number.

8481857437 is a deficient number, since it is larger than the sum of its proper divisors (1).

8481857437 is an equidigital number, since it uses as much as digits as its factorization.

8481857437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6021120, while the sum is 55.

The square root of 8481857437 is about 92097.0001520136. Note that the first 3 decimals coincide. The cubic root of 8481857437 is about 2039.3745228572.

The spelling of 8481857437 in words is "eight billion, four hundred eighty-one million, eight hundred fifty-seven thousand, four hundred thirty-seven".