3816013781 has 2 divisors, whose sum is σ = 3816013782. Its totient is φ = 3816013780.

The previous prime is 3816013723. The next prime is 3816013793. The reversal of 3816013781 is 1873106183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3793451281 + 22562500 = 61591^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 3816013781 - 2¹⁰ = 3816012757 is a prime.

It is a super-2 number, since 2×3816013781² = 29123922353563831922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3816013711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908006890 + 1908006891.

It is an arithmetic number, because the mean of its divisors is an integer number (1908006891).

Almost surely, 2^3816013781 is an apocalyptic number.

It is an amenable number.

3816013781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3816013781 is an equidigital number, since it uses as much as digits as its factorization.

3816013781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 3816013781 is about 61773.8923899085. The cubic root of 3816013781 is about 1562.6797275585.

The spelling of 3816013781 in words is "three billion, eight hundred sixteen million, thirteen thousand, seven hundred eighty-one".