378618909838 has 32 divisors (see below), whose sum is σ = 617944017600. Its totient is φ = 172941094656.

The previous prime is 378618909827. The next prime is 378618909853. The reversal of 378618909838 is 838909816873.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4264968 + ... + 4352836.

It is an arithmetic number, because the mean of its divisors is an integer number (19310750550).

Almost surely, 2^378618909838 is an apocalyptic number.

378618909838 is a deficient number, since it is larger than the sum of its proper divisors (239325107762).

378618909838 is a wasteful number, since it uses less digits than its factorization.

378618909838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89596.

The product of its (nonzero) digits is 125411328, while the sum is 70.

The spelling of 378618909838 in words is "three hundred seventy-eight billion, six hundred eighteen million, nine hundred nine thousand, eight hundred thirty-eight".