638601831253 has 8 divisors (see below), whose sum is σ = 670048718976. Its totient is φ = 607461742800.

The previous prime is 638601831247. The next prime is 638601831277. The reversal of 638601831253 is 352138106836.

638601831253 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 a de Polignac number, because none of the positive numbers 2^k-638601831253 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 (638601831223) 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, 76695553 + ... + 76703878.

It is an arithmetic number, because the mean of its divisors is an integer number (83756089872).

Almost surely, 2^638601831253 is an apocalyptic number.

It is an amenable number.

638601831253 is a deficient number, since it is larger than the sum of its proper divisors (31446887723).

638601831253 is a wasteful number, since it uses less digits than its factorization.

638601831253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153399635.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 638601831253 in words is "six hundred thirty-eight billion, six hundred one million, eight hundred thirty-one thousand, two hundred fifty-three".