638824102447 has 8 divisors (see below), whose sum is σ = 639722134800. Its totient is φ = 637926214464.

The previous prime is 638824102327. The next prime is 638824102451. The reversal of 638824102447 is 744201428836.

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 638824102447 - 2¹⁵ = 638824069679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638824102447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638824142447) 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, 11280579 + ... + 11337067.

It is an arithmetic number, because the mean of its divisors is an integer number (79965266850).

Almost surely, 2^638824102447 is an apocalyptic number.

638824102447 is a deficient number, since it is larger than the sum of its proper divisors (898032353).

638824102447 is a wasteful number, since it uses less digits than its factorization.

638824102447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72185.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 638824102447 in words is "six hundred thirty-eight billion, eight hundred twenty-four million, one hundred two thousand, four hundred forty-seven".