638587048015 has 48 divisors (see below), whose sum is σ = 922456080000. Its totient is φ = 422650109952.

The previous prime is 638587047997. The next prime is 638587048079. The reversal of 638587048015 is 510840785836.

It is a de Polignac number, because none of the positive numbers 2^k-638587048015 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 24548986 + ... + 24574984.

It is an arithmetic number, because the mean of its divisors is an integer number (19217835000).

Almost surely, 2^638587048015 is an apocalyptic number.

638587048015 is a deficient number, since it is larger than the sum of its proper divisors (283869031985).

638587048015 is a wasteful number, since it uses less digits than its factorization.

638587048015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29504 (or 29497 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 638587048015 in words is "six hundred thirty-eight billion, five hundred eighty-seven million, forty-eight thousand, fifteen".