378778877873 has 4 divisors (see below), whose sum is σ = 413213321328. Its totient is φ = 344344434420.

The previous prime is 378778877839. The next prime is 378778877881.

378778877873 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 378778877873 - 2¹² = 378778873777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378778871873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17217221711 + ... + 17217221732.

It is an arithmetic number, because the mean of its divisors is an integer number (103303330332).

Almost surely, 2^378778877873 is an apocalyptic number.

It is an amenable number.

378778877873 is a deficient number, since it is larger than the sum of its proper divisors (34434443455).

378778877873 is a wasteful number, since it uses less digits than its factorization.

378778877873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34434443454.

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

The spelling of 378778877873 in words is "three hundred seventy-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred seventy-three".