381138377513 has 2 divisors, whose sum is σ = 381138377514. Its totient is φ = 381138377512.

The previous prime is 381138377461. The next prime is 381138377569. The reversal of 381138377513 is 315773831183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206554797289 + 174583580224 = 454483^2 + 417832^2 .

It is a cyclic number.

It is not a de Polignac number, because 381138377513 - 2⁶ = 381138377449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (381138370513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190569188756 + 190569188757.

It is an arithmetic number, because the mean of its divisors is an integer number (190569188757).

Almost surely, 2^381138377513 is an apocalyptic number.

It is an amenable number.

381138377513 is a deficient number, since it is larger than the sum of its proper divisors (1).

381138377513 is an equidigital number, since it uses as much as digits as its factorization.

381138377513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The spelling of 381138377513 in words is "three hundred eighty-one billion, one hundred thirty-eight million, three hundred seventy-seven thousand, five hundred thirteen".