638485270058 has 16 divisors (see below), whose sum is σ = 963415332096. Its totient is φ = 317350971360.

The previous prime is 638485270019. The next prime is 638485270063. The reversal of 638485270058 is 850072584836.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 638485269985 and 638485270012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727691 + ... + 1344062.

It is an arithmetic number, because the mean of its divisors is an integer number (60213458256).

Almost surely, 2^638485270058 is an apocalyptic number.

638485270058 is a deficient number, since it is larger than the sum of its proper divisors (324930062038).

638485270058 is a wasteful number, since it uses less digits than its factorization.

638485270058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072669.

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 638485270058 in words is "six hundred thirty-eight billion, four hundred eighty-five million, two hundred seventy thousand, fifty-eight".