638584847474 has 24 divisors (see below), whose sum is σ = 1114422266880. Its totient is φ = 273640691016.

The previous prime is 638584847449. The next prime is 638584847539. The reversal of 638584847474 is 474748485836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246479 + ... + 1156685.

It is an arithmetic number, because the mean of its divisors is an integer number (46434261120).

Almost surely, 2^638584847474 is an apocalyptic number.

638584847474 is a deficient number, since it is larger than the sum of its proper divisors (475837419406).

638584847474 is a wasteful number, since it uses less digits than its factorization.

638584847474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917382 (or 917375 counting only the distinct ones).

The product of its digits is 578027520, while the sum is 68.

The spelling of 638584847474 in words is "six hundred thirty-eight billion, five hundred eighty-four million, eight hundred forty-seven thousand, four hundred seventy-four".