3878770778783 has 4 divisors (see below), whose sum is σ = 3879019704768. Its totient is φ = 3878521852800.

The previous prime is 3878770778741. The next prime is 3878770778821.

3878770778783 is nontrivially palindromic in base 10.

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-3878770778783 is a prime.

It is a super-2 number, since 2×3878770778783² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3878770778698 and 3878770778707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878770771783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124439618 + ... + 124470783.

It is an arithmetic number, because the mean of its divisors is an integer number (969754926192).

Almost surely, 2^{3878770778783} is an apocalyptic number.

3878770778783 is a deficient number, since it is larger than the sum of its proper divisors (248925985).

3878770778783 is a wasteful number, since it uses less digits than its factorization.

3878770778783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248925984.

The product of its (nonzero) digits is 4337012736, while the sum is 80.

The spelling of 3878770778783 in words is "three trillion, eight hundred seventy-eight billion, seven hundred seventy million, seven hundred seventy-eight thousand, seven hundred eighty-three".