638355542113 has 8 divisors (see below), whose sum is σ = 639120410432. Its totient is φ = 637590810096.

The previous prime is 638355542087. The next prime is 638355542131. The reversal of 638355542113 is 311245553836.

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 638355542113 - 2¹⁷ = 638355411041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638355542173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11733931 + ... + 11788207.

It is an arithmetic number, because the mean of its divisors is an integer number (79890051304).

Almost surely, 2^638355542113 is an apocalyptic number.

It is an amenable number.

638355542113 is a deficient number, since it is larger than the sum of its proper divisors (764868319).

638355542113 is a wasteful number, since it uses less digits than its factorization.

638355542113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68151.

The product of its digits is 1296000, while the sum is 46.

The spelling of 638355542113 in words is "six hundred thirty-eight billion, three hundred fifty-five million, five hundred forty-two thousand, one hundred thirteen".