634976820005 has 8 divisors (see below), whose sum is σ = 831242382624. Its totient is φ = 461801323600.

The previous prime is 634976819993. The next prime is 634976820007. The reversal of 634976820005 is 500028679436.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634976820005 - 2⁶ = 634976819941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634976820007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5772516491 + ... + 5772516600.

It is an arithmetic number, because the mean of its divisors is an integer number (103905297828).

Almost surely, 2^634976820005 is an apocalyptic number.

It is an amenable number.

634976820005 is a deficient number, since it is larger than the sum of its proper divisors (196265562619).

634976820005 is a wasteful number, since it uses less digits than its factorization.

634976820005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545033107.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 634976820005 in words is "six hundred thirty-four billion, nine hundred seventy-six million, eight hundred twenty thousand, five".