638358080747 has 8 divisors (see below), whose sum is σ = 639608925456. Its totient is φ = 637107543072.

The previous prime is 638358080687. The next prime is 638358080821. The reversal of 638358080747 is 747080853836.

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 638358080747 - 2²⁶ = 638290971883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638358080947) by changing a digit.

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, 4332533 + ... + 4477449.

It is an arithmetic number, because the mean of its divisors is an integer number (79951115682).

Almost surely, 2^638358080747 is an apocalyptic number.

638358080747 is a deficient number, since it is larger than the sum of its proper divisors (1250844709).

638358080747 is a wasteful number, since it uses less digits than its factorization.

638358080747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153517.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 638358080747 in words is "six hundred thirty-eight billion, three hundred fifty-eight million, eighty thousand, seven hundred forty-seven".