451440161 has 2 divisors, whose sum is σ = 451440162. Its totient is φ = 451440160.

The previous prime is 451440137. The next prime is 451440173. The reversal of 451440161 is 161044154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381967936 + 69472225 = 19544^2 + 8335^2 .

It is a cyclic number.

It is not a de Polignac number, because 451440161 - 2¹⁰ = 451439137 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 451440161.

It is not a weakly prime, because it can be changed into another prime (451440131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225720080 + 225720081.

It is an arithmetic number, because the mean of its divisors is an integer number (225720081).

Almost surely, 2^451440161 is an apocalyptic number.

It is an amenable number.

451440161 is a deficient number, since it is larger than the sum of its proper divisors (1).

451440161 is an equidigital number, since it uses as much as digits as its factorization.

451440161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 451440161 is about 21247.1212402998. The cubic root of 451440161 is about 767.1260499734.

The spelling of 451440161 in words is "four hundred fifty-one million, four hundred forty thousand, one hundred sixty-one".