18005560617179 has 2 divisors, whose sum is σ = 18005560617180. Its totient is φ = 18005560617178.

The previous prime is 18005560617127. The next prime is 18005560617211. The reversal of 18005560617179 is 97171606550081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18005560617179 is a prime.

It is a super-2 number, since 2×18005560617179² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18005560617479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9002780308589 + 9002780308590.

It is an arithmetic number, because the mean of its divisors is an integer number (9002780308590).

Almost surely, 2^{18005560617179} is an apocalyptic number.

18005560617179 is a deficient number, since it is larger than the sum of its proper divisors (1).

18005560617179 is an equidigital number, since it uses as much as digits as its factorization.

18005560617179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 56.

The spelling of 18005560617179 in words is "eighteen trillion, five billion, five hundred sixty million, six hundred seventeen thousand, one hundred seventy-nine".