8621481559 has 2 divisors, whose sum is σ = 8621481560. Its totient is φ = 8621481558.

The previous prime is 8621481521. The next prime is 8621481563. The reversal of 8621481559 is 9551841268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8621481559 - 2⁹ = 8621481047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8621482559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310740779 + 4310740780.

It is an arithmetic number, because the mean of its divisors is an integer number (4310740780).

Almost surely, 2^8621481559 is an apocalyptic number.

8621481559 is a deficient number, since it is larger than the sum of its proper divisors (1).

8621481559 is an equidigital number, since it uses as much as digits as its factorization.

8621481559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 49.

The square root of 8621481559 is about 92851.9335232175. The cubic root of 8621481559 is about 2050.5040647450.

The spelling of 8621481559 in words is "eight billion, six hundred twenty-one million, four hundred eighty-one thousand, five hundred fifty-nine".