18484656557573 has 2 divisors, whose sum is σ = 18484656557574. Its totient is φ = 18484656557572.

The previous prime is 18484656557557. The next prime is 18484656557597. The reversal of 18484656557573 is 37575565648481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10826192541124 + 7658464016449 = 3290318^2 + 2767393^2 .

It is a cyclic number.

It is not a de Polignac number, because 18484656557573 - 2⁴ = 18484656557557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18484656557573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18484656557513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242328278786 + 9242328278787.

It is an arithmetic number, because the mean of its divisors is an integer number (9242328278787).

Almost surely, 2^{18484656557573} is an apocalyptic number.

It is an amenable number.

18484656557573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18484656557573 is an equidigital number, since it uses as much as digits as its factorization.

18484656557573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880000, while the sum is 74.

The spelling of 18484656557573 in words is "eighteen trillion, four hundred eighty-four billion, six hundred fifty-six million, five hundred fifty-seven thousand, five hundred seventy-three".