378885438391 has 2 divisors, whose sum is σ = 378885438392. Its totient is φ = 378885438390.

The previous prime is 378885438341. The next prime is 378885438467. The reversal of 378885438391 is 193834588873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378885438391 - 2¹⁷ = 378885307319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378885438311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189442719195 + 189442719196.

It is an arithmetic number, because the mean of its divisors is an integer number (189442719196).

Almost surely, 2^378885438391 is an apocalyptic number.

378885438391 is a deficient number, since it is larger than the sum of its proper divisors (1).

378885438391 is an equidigital number, since it uses as much as digits as its factorization.

378885438391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139345920, while the sum is 67.

The spelling of 378885438391 in words is "three hundred seventy-eight billion, eight hundred eighty-five million, four hundred thirty-eight thousand, three hundred ninety-one".