638707010611 has 8 divisors (see below), whose sum is σ = 654308336304. Its totient is φ = 623106785280.

The previous prime is 638707010609. The next prime is 638707010647. The reversal of 638707010611 is 116010707836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638707010611 - 2¹ = 638707010609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638707010681) 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, 967731 + ... + 1487923.

It is an arithmetic number, because the mean of its divisors is an integer number (81788542038).

Almost surely, 2^638707010611 is an apocalyptic number.

638707010611 is a deficient number, since it is larger than the sum of its proper divisors (15601325693).

638707010611 is a wasteful number, since it uses less digits than its factorization.

638707010611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550181.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 638707010611 in words is "six hundred thirty-eight billion, seven hundred seven million, ten thousand, six hundred eleven".