138630210242 has 8 divisors (see below), whose sum is σ = 208002880956. Its totient is φ = 69295916592.

The previous prime is 138630210223. The next prime is 138630210253. The reversal of 138630210242 is 242012036831.

It can be written as a sum of positive squares in 2 ways, for example, as 86400135721 + 52230074521 = 293939^2 + 228539^2 .

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

It is a super-2 number, since 2×138630210242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138630210199 and 138630210208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9585233 + ... + 9599684.

Almost surely, 2^138630210242 is an apocalyptic number.

138630210242 is a deficient number, since it is larger than the sum of its proper divisors (69372670714).

138630210242 is a wasteful number, since it uses less digits than its factorization.

138630210242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19188532.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 138630210242 in words is "one hundred thirty-eight billion, six hundred thirty million, two hundred ten thousand, two hundred forty-two".