638636201146 has 8 divisors (see below), whose sum is σ = 969495920064. Its totient is φ = 315470894460.

The previous prime is 638636201011. The next prime is 638636201167. The reversal of 638636201146 is 641102636836.

638636201146 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 junction number, because it is equal to n+sod(n) for n = 638636201096 and 638636201105.

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, 1923602850 + ... + 1923603181.

It is an arithmetic number, because the mean of its divisors is an integer number (121186990008).

Almost surely, 2^638636201146 is an apocalyptic number.

638636201146 is a deficient number, since it is larger than the sum of its proper divisors (330859718918).

638636201146 is a wasteful number, since it uses less digits than its factorization.

638636201146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847206116.

The product of its (nonzero) digits is 746496, while the sum is 46.

It can be divided in two parts, 63863 and 6201146, that added together give a square (6265009 = 2503²).

The spelling of 638636201146 in words is "six hundred thirty-eight billion, six hundred thirty-six million, two hundred one thousand, one hundred forty-six".