634985469768 has 96 divisors (see below), whose sum is σ = 1755543888000. Its totient is φ = 191223062784.

The previous prime is 634985469709. The next prime is 634985469817. The reversal of 634985469768 is 867964589436.

It is a self number, because there is not a number n which added to its sum of digits gives 634985469768.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1474843 + ... + 1856106.

It is an arithmetic number, because the mean of its divisors is an integer number (18286915500).

Almost surely, 2^634985469768 is an apocalyptic number.

It is an amenable number.

634985469768 is an abundant number, since it is smaller than the sum of its proper divisors (1120558418232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634985469768 is a wasteful number, since it uses less digits than its factorization.

634985469768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331031 (or 3331014 counting only the distinct ones).

The product of its digits is 1881169920, while the sum is 75.

The spelling of 634985469768 in words is "six hundred thirty-four billion, nine hundred eighty-five million, four hundred sixty-nine thousand, seven hundred sixty-eight".