3781955899 has 2 divisors, whose sum is σ = 3781955900. Its totient is φ = 3781955898.

The previous prime is 3781955893. The next prime is 3781955923. The reversal of 3781955899 is 9985591873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3781955899 - 2⁵ = 3781955867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3781955899.

It is not a weakly prime, because it can be changed into another prime (3781955893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890977949 + 1890977950.

It is an arithmetic number, because the mean of its divisors is an integer number (1890977950).

Almost surely, 2^3781955899 is an apocalyptic number.

3781955899 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781955899 is an equidigital number, since it uses as much as digits as its factorization.

3781955899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 64.

The square root of 3781955899 is about 61497.6088884763. The cubic root of 3781955899 is about 1558.0168613183.

The spelling of 3781955899 in words is "three billion, seven hundred eighty-one million, nine hundred fifty-five thousand, eight hundred ninety-nine".