18605281579 has 2 divisors, whose sum is σ = 18605281580. Its totient is φ = 18605281578.

The previous prime is 18605281553. The next prime is 18605281621. The reversal of 18605281579 is 97518250681.

It is a weak prime.

It is an emirp because it is prime and its reverse (97518250681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18605281579 - 2⁷ = 18605281451 is a prime.

It is not a weakly prime, because it can be changed into another prime (18605281529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9302640789 + 9302640790.

It is an arithmetic number, because the mean of its divisors is an integer number (9302640790).

Almost surely, 2^18605281579 is an apocalyptic number.

18605281579 is a deficient number, since it is larger than the sum of its proper divisors (1).

18605281579 is an equidigital number, since it uses as much as digits as its factorization.

18605281579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 18605281579 in words is "eighteen billion, six hundred five million, two hundred eighty-one thousand, five hundred seventy-nine".