638116704311 has 4 divisors (see below), whose sum is σ = 638126386800. Its totient is φ = 638107021824.

The previous prime is 638116704293. The next prime is 638116704343. The reversal of 638116704311 is 113407611836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638116704311 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 (638116704391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4741706 + ... + 4874423.

It is an arithmetic number, because the mean of its divisors is an integer number (159531596700).

Almost surely, 2^638116704311 is an apocalyptic number.

638116704311 is a deficient number, since it is larger than the sum of its proper divisors (9682489).

638116704311 is an equidigital number, since it uses as much as digits as its factorization.

638116704311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682488.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 638116704311 in words is "six hundred thirty-eight billion, one hundred sixteen million, seven hundred four thousand, three hundred eleven".