18284541261 has 48 divisors (see below), whose sum is σ = 29045644800. Its totient is φ = 10019560320.

The previous prime is 18284541251. The next prime is 18284541269. The reversal of 18284541261 is 16214548281.

It is not a de Polignac number, because 18284541261 - 2¹¹ = 18284539213 is a prime.

It is a super-3 number, since 3×18284541261³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18284541269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2078370 + ... + 2087148.

It is an arithmetic number, because the mean of its divisors is an integer number (605117600).

Almost surely, 2^18284541261 is an apocalyptic number.

It is an amenable number.

18284541261 is a deficient number, since it is larger than the sum of its proper divisors (10761103539).

18284541261 is an equidigital number, since it uses as much as digits as its factorization.

18284541261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930 (or 8889 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The spelling of 18284541261 in words is "eighteen billion, two hundred eighty-four million, five hundred forty-one thousand, two hundred sixty-one".