378196711891 has 2 divisors, whose sum is σ = 378196711892. Its totient is φ = 378196711890.

The previous prime is 378196711859. The next prime is 378196711909. The reversal of 378196711891 is 198117691873.

It is a strong prime.

It is an emirp because it is prime and its reverse (198117691873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378196711891 - 2⁵ = 378196711859 is a prime.

It is not a weakly prime, because it can be changed into another prime (378196717891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189098355945 + 189098355946.

It is an arithmetic number, because the mean of its divisors is an integer number (189098355946).

Almost surely, 2^378196711891 is an apocalyptic number.

378196711891 is a deficient number, since it is larger than the sum of its proper divisors (1).

378196711891 is an equidigital number, since it uses as much as digits as its factorization.

378196711891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 61.

The spelling of 378196711891 in words is "three hundred seventy-eight billion, one hundred ninety-six million, seven hundred eleven thousand, eight hundred ninety-one".