638636348141 has 8 divisors (see below), whose sum is σ = 699763338144. Its totient is φ = 578020881520.

The previous prime is 638636348113. The next prime is 638636348167. The reversal of 638636348141 is 141843636836.

638636348141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 638636348141 - 2¹⁰ = 638636347117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638636348941) 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, 127878230 + ... + 127883223.

It is an arithmetic number, because the mean of its divisors is an integer number (87470417268).

Almost surely, 2^638636348141 is an apocalyptic number.

It is an amenable number.

638636348141 is a deficient number, since it is larger than the sum of its proper divisors (61126990003).

638636348141 is a wasteful number, since it uses less digits than its factorization.

638636348141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255761691.

The product of its digits is 5971968, while the sum is 53.

The spelling of 638636348141 in words is "six hundred thirty-eight billion, six hundred thirty-six million, three hundred forty-eight thousand, one hundred forty-one".