381450218729 has 2 divisors, whose sum is σ = 381450218730. Its totient is φ = 381450218728.

The previous prime is 381450218713. The next prime is 381450218741. The reversal of 381450218729 is 927812054183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193818301504 + 187631917225 = 440248^2 + 433165^2 .

It is a cyclic number.

It is not a de Polignac number, because 381450218729 - 2⁴ = 381450218713 is a prime.

It is not a weakly prime, because it can be changed into another prime (381450218759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190725109364 + 190725109365.

It is an arithmetic number, because the mean of its divisors is an integer number (190725109365).

Almost surely, 2^381450218729 is an apocalyptic number.

It is an amenable number.

381450218729 is a deficient number, since it is larger than the sum of its proper divisors (1).

381450218729 is an equidigital number, since it uses as much as digits as its factorization.

381450218729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 381450218729 in words is "three hundred eighty-one billion, four hundred fifty million, two hundred eighteen thousand, seven hundred twenty-nine".