638126573214 has 64 divisors (see below), whose sum is σ = 1438180531200. Its totient is φ = 187286491392.

The previous prime is 638126573173. The next prime is 638126573221. The reversal of 638126573214 is 412375621836.

638126573214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148642 + ... + 1139450.

It is an arithmetic number, because the mean of its divisors is an integer number (22471570800).

Almost surely, 2^638126573214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638126573214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719090265600).

638126573214 is an abundant number, since it is smaller than the sum of its proper divisors (800053957986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638126573214 is a wasteful number, since it uses less digits than its factorization.

638126573214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991209.

The product of its digits is 1451520, while the sum is 48.

The spelling of 638126573214 in words is "six hundred thirty-eight billion, one hundred twenty-six million, five hundred seventy-three thousand, two hundred fourteen".