634381223842 has 8 divisors (see below), whose sum is σ = 954395492076. Its totient is φ = 316249393152.

The previous prime is 634381223813. The next prime is 634381223863. The reversal of 634381223842 is 248322183436.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 627420825801 + 6960398041 = 792099^2 + 83429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 634381223792 and 634381223801.

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 3 ways as a sum of consecutive naturals, for example, 470608543 + ... + 470609890.

Almost surely, 2^634381223842 is an apocalyptic number.

634381223842 is a deficient number, since it is larger than the sum of its proper divisors (320014268234).

634381223842 is a wasteful number, since it uses less digits than its factorization.

634381223842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941218772.

The product of its digits is 1327104, while the sum is 46.

The spelling of 634381223842 in words is "six hundred thirty-four billion, three hundred eighty-one million, two hundred twenty-three thousand, eight hundred forty-two".