451032166474181 has 2 divisors, whose sum is σ = 451032166474182. Its totient is φ = 451032166474180.

The previous prime is 451032166474159. The next prime is 451032166474207. The reversal of 451032166474181 is 181474661230154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419534199061156 + 31497967413025 = 20482534^2 + 5612305^2 .

It is a cyclic number.

It is not a de Polignac number, because 451032166474181 - 2⁴⁶ = 380663422296517 is a prime.

It is a super-2 number, since 2×451032166474181² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451032166474151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225516083237090 + 225516083237091.

It is an arithmetic number, because the mean of its divisors is an integer number (225516083237091).

Almost surely, 2^{451032166474181} is an apocalyptic number.

It is an amenable number.

451032166474181 is a deficient number, since it is larger than the sum of its proper divisors (1).

451032166474181 is an equidigital number, since it uses as much as digits as its factorization.

451032166474181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 451032166474181 in words is "four hundred fifty-one trillion, thirty-two billion, one hundred sixty-six million, four hundred seventy-four thousand, one hundred eighty-one".