180825550861 has 2 divisors, whose sum is σ = 180825550862. Its totient is φ = 180825550860.

The previous prime is 180825550823. The next prime is 180825550877. The reversal of 180825550861 is 168055528081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101917370025 + 78908180836 = 319245^2 + 280906^2 .

It is a cyclic number.

It is not a de Polignac number, because 180825550861 - 2²¹ = 180823453709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180825550561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90412775430 + 90412775431.

It is an arithmetic number, because the mean of its divisors is an integer number (90412775431).

Almost surely, 2^180825550861 is an apocalyptic number.

It is an amenable number.

180825550861 is a deficient number, since it is larger than the sum of its proper divisors (1).

180825550861 is an equidigital number, since it uses as much as digits as its factorization.

180825550861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768000, while the sum is 49.

The spelling of 180825550861 in words is "one hundred eighty billion, eight hundred twenty-five million, five hundred fifty thousand, eight hundred sixty-one".