381330722777 has 2 divisors, whose sum is σ = 381330722778. Its totient is φ = 381330722776.

The previous prime is 381330722761. The next prime is 381330722791. The reversal of 381330722777 is 777227033183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239547598096 + 141783124681 = 489436^2 + 376541^2 .

It is a cyclic number.

It is not a de Polignac number, because 381330722777 - 2⁴ = 381330722761 is a prime.

It is not a weakly prime, because it can be changed into another prime (381330722177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190665361388 + 190665361389.

It is an arithmetic number, because the mean of its divisors is an integer number (190665361389).

Almost surely, 2^381330722777 is an apocalyptic number.

It is an amenable number.

381330722777 is a deficient number, since it is larger than the sum of its proper divisors (1).

381330722777 is an equidigital number, since it uses as much as digits as its factorization.

381330722777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464, while the sum is 50.

The spelling of 381330722777 in words is "three hundred eighty-one billion, three hundred thirty million, seven hundred twenty-two thousand, seven hundred seventy-seven".