378627378187979 has 2 divisors, whose sum is σ = 378627378187980. Its totient is φ = 378627378187978.

The previous prime is 378627378187943. The next prime is 378627378188021. The reversal of 378627378187979 is 979781873726873.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378627378187979 is a prime.

It is not a weakly prime, because it can be changed into another prime (378627378187939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189313689093989 + 189313689093990.

It is an arithmetic number, because the mean of its divisors is an integer number (189313689093990).

Almost surely, 2^{378627378187979} is an apocalyptic number.

378627378187979 is a deficient number, since it is larger than the sum of its proper divisors (1).

378627378187979 is an equidigital number, since it uses as much as digits as its factorization.

378627378187979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75278149632, while the sum is 92.

The spelling of 378627378187979 in words is "three hundred seventy-eight trillion, six hundred twenty-seven billion, three hundred seventy-eight million, one hundred eighty-seven thousand, nine hundred seventy-nine".