3785398185761 has 2 divisors, whose sum is σ = 3785398185762. Its totient is φ = 3785398185760.

The previous prime is 3785398185719. The next prime is 3785398185763. The reversal of 3785398185761 is 1675818935873.

3785398185761 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 can be written as a sum of positive squares in only one way, i.e., 3117060870400 + 668337315361 = 1765520^2 + 817519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3785398185761 is a prime.

Together with 3785398185763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3785398185763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1892699092880 + 1892699092881.

It is an arithmetic number, because the mean of its divisors is an integer number (1892699092881).

Almost surely, 2^{3785398185761} is an apocalyptic number.

It is an amenable number.

3785398185761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3785398185761 is an equidigital number, since it uses as much as digits as its factorization.

3785398185761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 304819200, while the sum is 71.

The spelling of 3785398185761 in words is "three trillion, seven hundred eighty-five billion, three hundred ninety-eight million, one hundred eighty-five thousand, seven hundred sixty-one".