184194671621 has 2 divisors, whose sum is σ = 184194671622. Its totient is φ = 184194671620.

The previous prime is 184194671587. The next prime is 184194671623. The reversal of 184194671621 is 126176491481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154846185025 + 29348486596 = 393505^2 + 171314^2 .

It is an emirp because it is prime and its reverse (126176491481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-184194671621 is a prime.

It is a Sophie Germain prime.

Together with 184194671623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 184194671621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184194671623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92097335810 + 92097335811.

It is an arithmetic number, because the mean of its divisors is an integer number (92097335811).

Almost surely, 2^184194671621 is an apocalyptic number.

It is an amenable number.

184194671621 is a deficient number, since it is larger than the sum of its proper divisors (1).

184194671621 is an equidigital number, since it uses as much as digits as its factorization.

184194671621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The spelling of 184194671621 in words is "one hundred eighty-four billion, one hundred ninety-four million, six hundred seventy-one thousand, six hundred twenty-one".