8481857369 has 2 divisors, whose sum is σ = 8481857370. Its totient is φ = 8481857368.

The previous prime is 8481857353. The next prime is 8481857387. The reversal of 8481857369 is 9637581848.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7719379600 + 762477769 = 87860^2 + 27613^2 .

It is a cyclic number.

It is not a de Polignac number, because 8481857369 - 2⁴ = 8481857353 is a prime.

It is a super-2 number, since 2×8481857369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8481851369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4240928684 + 4240928685.

It is an arithmetic number, because the mean of its divisors is an integer number (4240928685).

Almost surely, 2^8481857369 is an apocalyptic number.

It is an amenable number.

8481857369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8481857369 is an equidigital number, since it uses as much as digits as its factorization.

8481857369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 59.

The square root of 8481857369 is about 92096.9997828377. Note that the first 3 decimals coincide. The cubic root of 8481857369 is about 2039.3745174073.

The spelling of 8481857369 in words is "eight billion, four hundred eighty-one million, eight hundred fifty-seven thousand, three hundred sixty-nine".