451172544161 has 2 divisors, whose sum is σ = 451172544162. Its totient is φ = 451172544160.

The previous prime is 451172544143. The next prime is 451172544241. The reversal of 451172544161 is 161445271154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443129862400 + 8042681761 = 665680^2 + 89681^2 .

It is a cyclic number.

It is not a de Polignac number, because 451172544161 - 2¹⁴ = 451172527777 is a prime.

It is not a weakly prime, because it can be changed into another prime (451172544101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225586272080 + 225586272081.

It is an arithmetic number, because the mean of its divisors is an integer number (225586272081).

Almost surely, 2^451172544161 is an apocalyptic number.

It is an amenable number.

451172544161 is a deficient number, since it is larger than the sum of its proper divisors (1).

451172544161 is an equidigital number, since it uses as much as digits as its factorization.

451172544161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 41.

The spelling of 451172544161 in words is "four hundred fifty-one billion, one hundred seventy-two million, five hundred forty-four thousand, one hundred sixty-one".