638063488735 has 16 divisors (see below), whose sum is σ = 811736923392. Its totient is φ = 480633696000.

The previous prime is 638063488721. The next prime is 638063488789. The reversal of 638063488735 is 537884360836.

It is not a de Polignac number, because 638063488735 - 2¹³ = 638063480543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55623166 + ... + 55634635.

It is an arithmetic number, because the mean of its divisors is an integer number (50733557712).

Almost surely, 2^638063488735 is an apocalyptic number.

638063488735 is a deficient number, since it is larger than the sum of its proper divisors (173673434657).

638063488735 is a wasteful number, since it uses less digits than its factorization.

638063488735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111257874.

The product of its (nonzero) digits is 69672960, while the sum is 61.

The spelling of 638063488735 in words is "six hundred thirty-eight billion, sixty-three million, four hundred eighty-eight thousand, seven hundred thirty-five".