638234502530 has 32 divisors (see below), whose sum is σ = 1152451998720. Its totient is φ = 254487764160.

The previous prime is 638234502523. The next prime is 638234502589. The reversal of 638234502530 is 35205432836.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8701751 + ... + 8774789.

It is an arithmetic number, because the mean of its divisors is an integer number (36014124960).

Almost surely, 2^638234502530 is an apocalyptic number.

638234502530 is a deficient number, since it is larger than the sum of its proper divisors (514217496190).

638234502530 is a wasteful number, since it uses less digits than its factorization.

638234502530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75794.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 638234502530 in words is "six hundred thirty-eight billion, two hundred thirty-four million, five hundred two thousand, five hundred thirty".