634689806276 has 24 divisors (see below), whose sum is σ = 1145499250560. Its totient is φ = 307476080352.

The previous prime is 634689806273. The next prime is 634689806291. The reversal of 634689806276 is 672608986436.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (634689806273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8936270 + ... + 9007013.

It is an arithmetic number, because the mean of its divisors is an integer number (47729135440).

Almost surely, 2^634689806276 is an apocalyptic number.

It is an amenable number.

634689806276 is a deficient number, since it is larger than the sum of its proper divisors (510809444284).

634689806276 is a wasteful number, since it uses less digits than its factorization.

634689806276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943563 (or 17943561 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 634689806276 in words is "six hundred thirty-four billion, six hundred eighty-nine million, eight hundred six thousand, two hundred seventy-six".