3816749497381 has 2 divisors, whose sum is σ = 3816749497382. Its totient is φ = 3816749497380.

The previous prime is 3816749497343. The next prime is 3816749497427. The reversal of 3816749497381 is 1837949476183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3249514574881 + 567234922500 = 1802641^2 + 753150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3816749497381 - 2¹¹ = 3816749495333 is a prime.

It is a super-2 number, since 2×3816749497381² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3816749497381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3816749437381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908374748690 + 1908374748691.

It is an arithmetic number, because the mean of its divisors is an integer number (1908374748691).

Almost surely, 2^{3816749497381} is an apocalyptic number.

It is an amenable number.

3816749497381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3816749497381 is an equidigital number, since it uses as much as digits as its factorization.

3816749497381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 70.

The spelling of 3816749497381 in words is "three trillion, eight hundred sixteen billion, seven hundred forty-nine million, four hundred ninety-seven thousand, three hundred eighty-one".