638012135062 has 16 divisors (see below), whose sum is σ = 963507330000. Its totient is φ = 316843319520.

The previous prime is 638012135011. The next prime is 638012135071. The reversal of 638012135062 is 260531210836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4816189 + ... + 4946887.

It is an arithmetic number, because the mean of its divisors is an integer number (60219208125).

Almost surely, 2^638012135062 is an apocalyptic number.

638012135062 is a deficient number, since it is larger than the sum of its proper divisors (325495194938).

638012135062 is a wasteful number, since it uses less digits than its factorization.

638012135062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147231.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 638012135062 its reverse (260531210836), we get a palindrome (898543345898).

The spelling of 638012135062 in words is "six hundred thirty-eight billion, twelve million, one hundred thirty-five thousand, sixty-two".