378815612347 has 2 divisors, whose sum is σ = 378815612348. Its totient is φ = 378815612346.

The previous prime is 378815612317. The next prime is 378815612369. The reversal of 378815612347 is 743216518873.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378815612347 is a prime.

It is not a weakly prime, because it can be changed into another prime (378815612317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189407806173 + 189407806174.

It is an arithmetic number, because the mean of its divisors is an integer number (189407806174).

Almost surely, 2^378815612347 is an apocalyptic number.

378815612347 is a deficient number, since it is larger than the sum of its proper divisors (1).

378815612347 is an equidigital number, since it uses as much as digits as its factorization.

378815612347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The spelling of 378815612347 in words is "three hundred seventy-eight billion, eight hundred fifteen million, six hundred twelve thousand, three hundred forty-seven".