3816942785 has 4 divisors (see below), whose sum is σ = 4580331348. Its totient is φ = 3053554224.

The previous prime is 3816942761. The next prime is 3816942809. The reversal of 3816942785 is 5872496183.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3816942761) and next prime (3816942809).

It can be written as a sum of positive squares in 2 ways, for example, as 2923889329 + 893053456 = 54073^2 + 29884^2 .

It is a cyclic number.

It is not a de Polignac number, because 3816942785 - 2⁶ = 3816942721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381694274 + ... + 381694283.

It is an arithmetic number, because the mean of its divisors is an integer number (1145082837).

Almost surely, 2^3816942785 is an apocalyptic number.

It is an amenable number.

3816942785 is a deficient number, since it is larger than the sum of its proper divisors (763388563).

3816942785 is an equidigital number, since it uses as much as digits as its factorization.

3816942785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763388562.

The product of its digits is 2903040, while the sum is 53.

The square root of 3816942785 is about 61781.4113225006. The cubic root of 3816942785 is about 1562.8065281073.

The spelling of 3816942785 in words is "three billion, eight hundred sixteen million, nine hundred forty-two thousand, seven hundred eighty-five".