638005380058 has 8 divisors (see below), whose sum is σ = 957987610452. Its totient is φ = 318676176576.

The previous prime is 638005380043. The next prime is 638005380083. The reversal of 638005380058 is 850083500836.

It can be written as a sum of positive squares in 2 ways, for example, as 405225184329 + 232780195729 = 636573^2 + 482473^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 163254285 + ... + 163258192.

Almost surely, 2^638005380058 is an apocalyptic number.

638005380058 is a deficient number, since it is larger than the sum of its proper divisors (319982230394).

638005380058 is a wasteful number, since it uses less digits than its factorization.

638005380058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326513456.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 638005380058 in words is "six hundred thirty-eight billion, five million, three hundred eighty thousand, fifty-eight".