180185881224157 has 2 divisors, whose sum is σ = 180185881224158. Its totient is φ = 180185881224156.

The previous prime is 180185881224127. The next prime is 180185881224179. The reversal of 180185881224157 is 751422188581081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151986956233401 + 28198924990756 = 12328299^2 + 5310266^2 .

It is a cyclic number.

It is not a de Polignac number, because 180185881224157 - 2⁷ = 180185881224029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180185881224095 and 180185881224104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180185881224127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90092940612078 + 90092940612079.

It is an arithmetic number, because the mean of its divisors is an integer number (90092940612079).

Almost surely, 2^{180185881224157} is an apocalyptic number.

It is an amenable number.

180185881224157 is a deficient number, since it is larger than the sum of its proper divisors (1).

180185881224157 is an equidigital number, since it uses as much as digits as its factorization.

180185881224157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11468800, while the sum is 61.

The spelling of 180185881224157 in words is "one hundred eighty trillion, one hundred eighty-five billion, eight hundred eighty-one million, two hundred twenty-four thousand, one hundred fifty-seven".