144336681 has 64 divisors (see below), whose sum is σ = 237219840. Its totient is φ = 86365440.

The previous prime is 144336677. The next prime is 144336691. The reversal of 144336681 is 186633441.

It is a happy number.

It is not a de Polignac number, because 144336681 - 2² = 144336677 is a prime.

It is a super-2 number, since 2×144336681² = 41666154964191522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (144336631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1401276 + ... + 1401378.

It is an arithmetic number, because the mean of its divisors is an integer number (3706560).

Almost surely, 2^144336681 is an apocalyptic number.

It is an amenable number.

144336681 is a deficient number, since it is larger than the sum of its proper divisors (92883159).

144336681 is a wasteful number, since it uses less digits than its factorization.

144336681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 237 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 144336681 is about 12014.0201847675. The cubic root of 144336681 is about 524.5564580358.

The spelling of 144336681 in words is "one hundred forty-four million, three hundred thirty-six thousand, six hundred eighty-one".