638407365241 has 8 divisors (see below), whose sum is σ = 666177082560. Its totient is φ = 610638720912.

The previous prime is 638407365223. The next prime is 638407365251. The reversal of 638407365241 is 142563704836.

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 638407365241 - 2¹¹ = 638407363193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638407365251) by changing a digit.

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, 1095070 + ... + 1573528.

It is an arithmetic number, because the mean of its divisors is an integer number (83272135320).

Almost surely, 2^638407365241 is an apocalyptic number.

It is an amenable number.

638407365241 is a deficient number, since it is larger than the sum of its proper divisors (27769717319).

638407365241 is a wasteful number, since it uses less digits than its factorization.

638407365241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536495.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 638407365241 in words is "six hundred thirty-eight billion, four hundred seven million, three hundred sixty-five thousand, two hundred forty-one".