138850008247818 has 48 divisors (see below), whose sum is σ = 349646509892160. Its totient is φ = 38999033791488.

The previous prime is 138850008247807. The next prime is 138850008247831. The reversal of 138850008247818 is 818742800058831.

138850008247818 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 500 + 0 + 8 + 2 + 47 + 81 + 8 = 666.

138850008247818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138850008247818² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9338841655 + ... + 9338856522.

It is an arithmetic number, because the mean of its divisors is an integer number (7284302289420).

Almost surely, 2^{138850008247818} is an apocalyptic number.

138850008247818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138850008247818 is an abundant number, since it is smaller than the sum of its proper divisors (210796501644342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138850008247818 is a wasteful number, since it uses less digits than its factorization.

138850008247818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18677698251 (or 18677698248 counting only the distinct ones).

The product of its (nonzero) digits is 27525120, while the sum is 63.

The spelling of 138850008247818 in words is "one hundred thirty-eight trillion, eight hundred fifty billion, eight million, two hundred forty-seven thousand, eight hundred eighteen".