138282249618 has 18 divisors (see below), whose sum is σ = 299614959189. Its totient is φ = 46093557312.

The previous prime is 138282249613. The next prime is 138282249619. The reversal of 138282249618 is 816942282831.

138282249618 is a `hidden beast` number, since 1 + 382 + 8 + 2 + 249 + 6 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 135632368089 + 2649881529 = 368283^2 + 51477^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=262947.

It is a super-2 number, since 2×138282249618² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138282249613) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1533858 + ... + 1621506.

Almost surely, 2^138282249618 is an apocalyptic number.

138282249618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138282249618 is an abundant number, since it is smaller than the sum of its proper divisors (161332709571).

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

138282249618 is an frugal number, since it uses more digits than its factorization.

138282249618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175306 (or 87654 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 138282249618 in words is "one hundred thirty-eight billion, two hundred eighty-two million, two hundred forty-nine thousand, six hundred eighteen".