638462013201 has 12 divisors (see below), whose sum is σ = 922245441780. Its totient is φ = 425630941920.

The previous prime is 638462013199. The next prime is 638462013227. The reversal of 638462013201 is 102310264836.

638462013201 is a `hidden beast` number, since 6 + 3 + 8 + 4 + 620 + 1 + 3 + 20 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 213554894400 + 424907118801 = 462120^2 + 651849^2 .

It is not a de Polignac number, because 638462013201 - 2¹ = 638462013199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638462013251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468246 + ... + 1223183.

It is an arithmetic number, because the mean of its divisors is an integer number (76853786815).

Almost surely, 2^638462013201 is an apocalyptic number.

It is an amenable number.

638462013201 is a deficient number, since it is larger than the sum of its proper divisors (283783428579).

638462013201 is a wasteful number, since it uses less digits than its factorization.

638462013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733376 (or 1733373 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 638462013201 in words is "six hundred thirty-eight billion, four hundred sixty-two million, thirteen thousand, two hundred one".