3781117660819 has 2 divisors, whose sum is σ = 3781117660820. Its totient is φ = 3781117660818.

The previous prime is 3781117660763. The next prime is 3781117660841. The reversal of 3781117660819 is 9180667111873.

It is a happy number.

3781117660819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3781117660819 - 2¹¹ = 3781117658771 is a prime.

It is a super-2 number, since 2×3781117660819² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3781117661819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890558830409 + 1890558830410.

It is an arithmetic number, because the mean of its divisors is an integer number (1890558830410).

Almost surely, 2^{3781117660819} is an apocalyptic number.

3781117660819 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781117660819 is an equidigital number, since it uses as much as digits as its factorization.

3781117660819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 3781117660819 in words is "three trillion, seven hundred eighty-one billion, one hundred seventeen million, six hundred sixty thousand, eight hundred nineteen".