634321582378 has 16 divisors (see below), whose sum is σ = 1038051031104. Its totient is φ = 288308475360.

The previous prime is 634321582327. The next prime is 634321582381. The reversal of 634321582378 is 873285123436.

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 7 ways as a sum of consecutive naturals, for example, 640875 + ... + 1295902.

It is an arithmetic number, because the mean of its divisors is an integer number (64878189444).

Almost surely, 2^634321582378 is an apocalyptic number.

634321582378 is a deficient number, since it is larger than the sum of its proper divisors (403729448726).

634321582378 is a wasteful number, since it uses less digits than its factorization.

634321582378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951677.

The product of its digits is 5806080, while the sum is 52.

The spelling of 634321582378 in words is "six hundred thirty-four billion, three hundred twenty-one million, five hundred eighty-two thousand, three hundred seventy-eight".