18061277804573 has 2 divisors, whose sum is σ = 18061277804574. Its totient is φ = 18061277804572.

The previous prime is 18061277804527. The next prime is 18061277804599. The reversal of 18061277804573 is 37540877216081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11511885768889 + 6549392035684 = 3392917^2 + 2559178^2 .

It is a cyclic number.

It is not a de Polignac number, because 18061277804573 - 2⁶ = 18061277804509 is a prime.

It is a super-2 number, since 2×18061277804573² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18061277804503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9030638902286 + 9030638902287.

It is an arithmetic number, because the mean of its divisors is an integer number (9030638902287).

Almost surely, 2^{18061277804573} is an apocalyptic number.

It is an amenable number.

18061277804573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18061277804573 is an equidigital number, since it uses as much as digits as its factorization.

18061277804573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15805440, while the sum is 59.

The spelling of 18061277804573 in words is "eighteen trillion, sixty-one billion, two hundred seventy-seven million, eight hundred four thousand, five hundred seventy-three".