634318342864 has 20 divisors (see below), whose sum is σ = 1245827295556. Its totient is φ = 312814524672.

The previous prime is 634318342831. The next prime is 634318342891. The reversal of 634318342864 is 468243813436.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 359050227264 + 275268115600 = 599208^2 + 524660^2 .

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 3 ways as a sum of consecutive naturals, for example, 271539219 + ... + 271541554.

Almost surely, 2^634318342864 is an apocalyptic number.

It is an amenable number.

634318342864 is a deficient number, since it is larger than the sum of its proper divisors (611508952692).

634318342864 is a wasteful number, since it uses less digits than its factorization.

634318342864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543080854 (or 543080848 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 52.

The spelling of 634318342864 in words is "six hundred thirty-four billion, three hundred eighteen million, three hundred forty-two thousand, eight hundred sixty-four".