8340441581 has 2 divisors, whose sum is σ = 8340441582. Its totient is φ = 8340441580.

The previous prime is 8340441517. The next prime is 8340441607. The reversal of 8340441581 is 1851440438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7909256356 + 431185225 = 88934^2 + 20765^2 .

It is a cyclic number.

It is not a de Polignac number, because 8340441581 - 2⁶ = 8340441517 is a prime.

It is a super-2 number, since 2×8340441581² (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 (8340447581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170220790 + 4170220791.

It is an arithmetic number, because the mean of its divisors is an integer number (4170220791).

Almost surely, 2^8340441581 is an apocalyptic number.

It is an amenable number.

8340441581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8340441581 is an equidigital number, since it uses as much as digits as its factorization.

8340441581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 8340441581 is about 91326.0180945167. The cubic root of 8340441581 is about 2027.9769520085.

The spelling of 8340441581 in words is "eight billion, three hundred forty million, four hundred forty-one thousand, five hundred eighty-one".