638613782603 has 8 divisors (see below), whose sum is σ = 649450752000. Its totient is φ = 627777246888.

The previous prime is 638613782581. The next prime is 638613782629. The reversal of 638613782603 is 306287316836.

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 638613782603 - 2⁸ = 638613782347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638613782003) 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, 4531598 + ... + 4670396.

It is an arithmetic number, because the mean of its divisors is an integer number (81181344000).

Almost surely, 2^638613782603 is an apocalyptic number.

638613782603 is a deficient number, since it is larger than the sum of its proper divisors (10836969397).

638613782603 is a wasteful number, since it uses less digits than its factorization.

638613782603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216841.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 638613782603 in words is "six hundred thirty-eight billion, six hundred thirteen million, seven hundred eighty-two thousand, six hundred three".