3785445857 has 2 divisors, whose sum is σ = 3785445858. Its totient is φ = 3785445856.

The previous prime is 3785445787. The next prime is 3785445877. The reversal of 3785445857 is 7585445873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3181072801 + 604373056 = 56401^2 + 24584^2 .

It is an emirp because it is prime and its reverse (7585445873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3785445857 - 2¹² = 3785441761 is a prime.

It is not a weakly prime, because it can be changed into another prime (3785445877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1892722928 + 1892722929.

It is an arithmetic number, because the mean of its divisors is an integer number (1892722929).

Almost surely, 2^3785445857 is an apocalyptic number.

It is an amenable number.

3785445857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3785445857 is an equidigital number, since it uses as much as digits as its factorization.

3785445857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816000, while the sum is 56.

The square root of 3785445857 is about 61525.9770909817. The cubic root of 3785445857 is about 1558.4959557232.

The spelling of 3785445857 in words is "three billion, seven hundred eighty-five million, four hundred forty-five thousand, eight hundred fifty-seven".