451440243620117 has 2 divisors, whose sum is σ = 451440243620118. Its totient is φ = 451440243620116.

The previous prime is 451440243620089. The next prime is 451440243620141. The reversal of 451440243620117 is 711026342044154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437139487910161 + 14300755709956 = 20907881^2 + 3781634^2 .

It is a cyclic number.

It is not a de Polignac number, because 451440243620117 - 2⁶ = 451440243620053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451440243620167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225720121810058 + 225720121810059.

It is an arithmetic number, because the mean of its divisors is an integer number (225720121810059).

Almost surely, 2^{451440243620117} is an apocalyptic number.

It is an amenable number.

451440243620117 is a deficient number, since it is larger than the sum of its proper divisors (1).

451440243620117 is an equidigital number, since it uses as much as digits as its factorization.

451440243620117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 451440243620117 in words is "four hundred fifty-one trillion, four hundred forty billion, two hundred forty-three million, six hundred twenty thousand, one hundred seventeen".