180484861 has 2 divisors, whose sum is σ = 180484862. Its totient is φ = 180484860.

The previous prime is 180484859. The next prime is 180484867. The reversal of 180484861 is 168484081.

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., 118940836 + 61544025 = 10906^2 + 7845^2 .

It is a cyclic number.

It is not a de Polignac number, because 180484861 - 2¹ = 180484859 is a prime.

Together with 180484859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180484867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90242430 + 90242431.

It is an arithmetic number, because the mean of its divisors is an integer number (90242431).

Almost surely, 2^180484861 is an apocalyptic number.

It is an amenable number.

180484861 is a deficient number, since it is larger than the sum of its proper divisors (1).

180484861 is an equidigital number, since it uses as much as digits as its factorization.

180484861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 180484861 is about 13434.4654154901. The cubic root of 180484861 is about 565.1281313285.

The spelling of 180484861 in words is "one hundred eighty million, four hundred eighty-four thousand, eight hundred sixty-one".