839346906478 has 4 divisors (see below), whose sum is σ = 1259020359720. Its totient is φ = 419673453238.

The previous prime is 839346906443. The next prime is 839346906509. The reversal of 839346906478 is 874609643938.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209836726618 + ... + 209836726621.

It is an arithmetic number, because the mean of its divisors is an integer number (314755089930).

Almost surely, 2^839346906478 is an apocalyptic number.

839346906478 is a deficient number, since it is larger than the sum of its proper divisors (419673453242).

839346906478 is a wasteful number, since it uses less digits than its factorization.

839346906478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419673453241.

The product of its (nonzero) digits is 188116992, while the sum is 67.

The spelling of 839346906478 in words is "eight hundred thirty-nine billion, three hundred forty-six million, nine hundred six thousand, four hundred seventy-eight".