3785320478939 has 4 divisors (see below), whose sum is σ = 3801027203160. Its totient is φ = 3769613754720.

The previous prime is 3785320478903. The next prime is 3785320478981. The reversal of 3785320478939 is 9398740235873.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3785320478939 is a prime.

It is a super-2 number, since 2×3785320478939² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3785320474939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853361749 + ... + 7853362230.

It is an arithmetic number, because the mean of its divisors is an integer number (950256800790).

Almost surely, 2^{3785320478939} is an apocalyptic number.

3785320478939 is a deficient number, since it is larger than the sum of its proper divisors (15706724221).

3785320478939 is a wasteful number, since it uses less digits than its factorization.

3785320478939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15706724220.

The product of its (nonzero) digits is 274337280, while the sum is 68.

The spelling of 3785320478939 in words is "three trillion, seven hundred eighty-five billion, three hundred twenty million, four hundred seventy-eight thousand, nine hundred thirty-nine".