378355488638 has 12 divisors (see below), whose sum is σ = 602881324512. Its totient is φ = 178049641440.

The previous prime is 378355488631. The next prime is 378355488661. The reversal of 378355488638 is 836884553873.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378355488631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327296558 + ... + 327297713.

It is an arithmetic number, because the mean of its divisors is an integer number (50240110376).

Almost surely, 2^378355488638 is an apocalyptic number.

378355488638 is a deficient number, since it is larger than the sum of its proper divisors (224525835874).

378355488638 is a wasteful number, since it uses less digits than its factorization.

378355488638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654594307 (or 654594290 counting only the distinct ones).

The product of its digits is 464486400, while the sum is 68.

The spelling of 378355488638 in words is "three hundred seventy-eight billion, three hundred fifty-five million, four hundred eighty-eight thousand, six hundred thirty-eight".