634397130856 has 48 divisors (see below), whose sum is σ = 1229767841700. Its totient is φ = 306800363520.

The previous prime is 634397130841. The next prime is 634397130869. The reversal of 634397130856 is 658031793436.

It can be written as a sum of positive squares in 2 ways, for example, as 634039542756 + 357588100 = 796266^2 + 18910^2 .

It is a junction number, because it is equal to n+sod(n) for n = 634397130797 and 634397130806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14839560 + ... + 14882248.

Almost surely, 2^634397130856 is an apocalyptic number.

It is an amenable number.

634397130856 is a deficient number, since it is larger than the sum of its proper divisors (595370710844).

634397130856 is a wasteful number, since it uses less digits than its factorization.

634397130856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44690 (or 44655 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 634397130856 in words is "six hundred thirty-four billion, three hundred ninety-seven million, one hundred thirty thousand, eight hundred fifty-six".