638800434898 has 8 divisors (see below), whose sum is σ = 965094182640. Its totient is φ = 317102374020.

The previous prime is 638800434863. The next prime is 638800434917. The reversal of 638800434898 is 898434008836.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148921368 + ... + 1148921923.

It is an arithmetic number, because the mean of its divisors is an integer number (120636772830).

Almost surely, 2^638800434898 is an apocalyptic number.

638800434898 is a deficient number, since it is larger than the sum of its proper divisors (326293747742).

638800434898 is a wasteful number, since it uses less digits than its factorization.

638800434898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297843432.

The product of its (nonzero) digits is 31850496, while the sum is 61.

The spelling of 638800434898 in words is "six hundred thirty-eight billion, eight hundred million, four hundred thirty-four thousand, eight hundred ninety-eight".