3781217663 has 2 divisors, whose sum is σ = 3781217664. Its totient is φ = 3781217662.

The previous prime is 3781217623. The next prime is 3781217689. The reversal of 3781217663 is 3667121873.

3781217663 is digitally balanced in base 3, 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 3781217663 - 2¹² = 3781213567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3781217603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890608831 + 1890608832.

It is an arithmetic number, because the mean of its divisors is an integer number (1890608832).

Almost surely, 2^3781217663 is an apocalyptic number.

3781217663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781217663 is an equidigital number, since it uses as much as digits as its factorization.

3781217663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 3781217663 is about 61491.6064434814. The cubic root of 3781217663 is about 1557.9154800037.

The spelling of 3781217663 in words is "three billion, seven hundred eighty-one million, two hundred seventeen thousand, six hundred sixty-three".