144164681 has 6 divisors (see below), whose sum is σ = 147597210. Its totient is φ = 140810208.

The previous prime is 144164659. The next prime is 144164701. The reversal of 144164681 is 186461441.

144164681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 129846025 + 14318656 = 11395^2 + 3784^2 .

It is not a de Polignac number, because 144164681 - 2¹⁴ = 144148297 is a prime.

It is a super-4 number, since 4×144164681⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144161681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37136 + ... + 40833.

It is an arithmetic number, because the mean of its divisors is an integer number (24599535).

Almost surely, 2^144164681 is an apocalyptic number.

It is an amenable number.

144164681 is a deficient number, since it is larger than the sum of its proper divisors (3432529).

144164681 is an frugal number, since it uses more digits than its factorization.

144164681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78055 (or 78012 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 144164681 is about 12006.8597476609. The cubic root of 144164681 is about 524.3480112004.

The spelling of 144164681 in words is "one hundred forty-four million, one hundred sixty-four thousand, six hundred eighty-one".