638581200532 has 48 divisors (see below), whose sum is σ = 1233985116672. Its totient is φ = 286723450080.

The previous prime is 638581200503. The next prime is 638581200533. The reversal of 638581200532 is 235002185836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638581200533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43842283 + ... + 43856845.

It is an arithmetic number, because the mean of its divisors is an integer number (25708023264).

Almost surely, 2^638581200532 is an apocalyptic number.

It is an amenable number.

638581200532 is a deficient number, since it is larger than the sum of its proper divisors (595403916140).

638581200532 is a wasteful number, since it uses less digits than its factorization.

638581200532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668 (or 26666 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 638581200532 in words is "six hundred thirty-eight billion, five hundred eighty-one million, two hundred thousand, five hundred thirty-two".