638319560552 has 8 divisors (see below), whose sum is σ = 1196849176050. Its totient is φ = 319159780272.

The previous prime is 638319560539. The next prime is 638319560587. The reversal of 638319560552 is 255065913836.

It can be written as a sum of positive squares in only one way, i.e., 512389682596 + 125929877956 = 715814^2 + 354866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×638319560552² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638319560494 and 638319560503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39894972527 + ... + 39894972542.

Almost surely, 2^638319560552 is an apocalyptic number.

It is an amenable number.

638319560552 is a deficient number, since it is larger than the sum of its proper divisors (558529615498).

638319560552 is a wasteful number, since it uses less digits than its factorization.

638319560552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79789945075 (or 79789945071 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 638319560552 in words is "six hundred thirty-eight billion, three hundred nineteen million, five hundred sixty thousand, five hundred fifty-two".