634842513658 has 16 divisors (see below), whose sum is σ = 1008296536320. Its totient is φ = 298744307136.

The previous prime is 634842513631. The next prime is 634842513667. The reversal of 634842513658 is 856315248436.

It is a junction number, because it is equal to n+sod(n) for n = 634842513599 and 634842513608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2497573 + ... + 2739991.

It is an arithmetic number, because the mean of its divisors is an integer number (63018533520).

Almost surely, 2^634842513658 is an apocalyptic number.

634842513658 is a deficient number, since it is larger than the sum of its proper divisors (373454022662).

634842513658 is a wasteful number, since it uses less digits than its factorization.

634842513658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319461.

The product of its digits is 16588800, while the sum is 55.

The spelling of 634842513658 in words is "six hundred thirty-four billion, eight hundred forty-two million, five hundred thirteen thousand, six hundred fifty-eight".