18461716481 has 4 divisors (see below), whose sum is σ = 19881848532. Its totient is φ = 17041584432.

The previous prime is 18461716459. The next prime is 18461716489.

18461716481 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1717356481 + 16744360000 = 41441^2 + 129400^2 .

It is a cyclic number.

It is not a de Polignac number, because 18461716481 - 2¹⁴ = 18461700097 is a prime.

It is a super-2 number, since 2×18461716481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18461716489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710066006 + ... + 710066031.

It is an arithmetic number, because the mean of its divisors is an integer number (4970462133).

Almost surely, 2^18461716481 is an apocalyptic number.

It is an amenable number.

18461716481 is a deficient number, since it is larger than the sum of its proper divisors (1420132051).

18461716481 is a wasteful number, since it uses less digits than its factorization.

18461716481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420132050.

The product of its digits is 258048, while the sum is 47.

The spelling of 18461716481 in words is "eighteen billion, four hundred sixty-one million, seven hundred sixteen thousand, four hundred eighty-one".