144398685618 has 96 divisors (see below), whose sum is σ = 359467580160. Its totient is φ = 41431309920.

The previous prime is 144398685611. The next prime is 144398685671. The reversal of 144398685618 is 816586893441.

144398685618 is a `hidden beast` number, since 1 + 4 + 4 + 3 + 9 + 8 + 6 + 8 + 5 + 618 = 666.

144398685618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (144398685611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7525705 + ... + 7544867.

It is an arithmetic number, because the mean of its divisors is an integer number (3744453960).

Almost surely, 2^144398685618 is an apocalyptic number.

144398685618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 144398685618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179733790080).

144398685618 is an abundant number, since it is smaller than the sum of its proper divisors (215068894542).

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

144398685618 is a wasteful number, since it uses less digits than its factorization.

144398685618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21204 (or 21201 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 144398685618 in words is "one hundred forty-four billion, three hundred ninety-eight million, six hundred eighty-five thousand, six hundred eighteen".