638488074305 has 8 divisors (see below), whose sum is σ = 766197470592. Its totient is φ = 510782605168.

The previous prime is 638488074299. The next prime is 638488074337. The reversal of 638488074305 is 503470884836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638488074305 - 2³⁴ = 621308205121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611399 + ... + 1284828.

It is an arithmetic number, because the mean of its divisors is an integer number (95774683824).

Almost surely, 2^638488074305 is an apocalyptic number.

It is an amenable number.

638488074305 is a deficient number, since it is larger than the sum of its proper divisors (127709396287).

638488074305 is a wasteful number, since it uses less digits than its factorization.

638488074305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963575.

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 638488074305 in words is "six hundred thirty-eight billion, four hundred eighty-eight million, seventy-four thousand, three hundred five".