381332773777 has 2 divisors, whose sum is σ = 381332773778. Its totient is φ = 381332773776.

The previous prime is 381332773741. The next prime is 381332773781. The reversal of 381332773777 is 777377233183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337881788176 + 43450985601 = 581276^2 + 208449^2 .

It is a cyclic number.

It is not a de Polignac number, because 381332773777 - 2¹⁹ = 381332249489 is a prime.

It is not a weakly prime, because it can be changed into another prime (381332773177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190666386888 + 190666386889.

It is an arithmetic number, because the mean of its divisors is an integer number (190666386889).

Almost surely, 2^381332773777 is an apocalyptic number.

It is an amenable number.

381332773777 is a deficient number, since it is larger than the sum of its proper divisors (1).

381332773777 is an equidigital number, since it uses as much as digits as its factorization.

381332773777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21781872, while the sum is 58.

The spelling of 381332773777 in words is "three hundred eighty-one billion, three hundred thirty-two million, seven hundred seventy-three thousand, seven hundred seventy-seven".