144220660105 has 4 divisors (see below), whose sum is σ = 173064792132. Its totient is φ = 115376528080.

The previous prime is 144220660081. The next prime is 144220660117. The reversal of 144220660105 is 501066022441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19738002064 + 124482658041 = 140492^2 + 352821^2 .

It is a de Polignac number, because none of the positive numbers 2^k-144220660105 is a prime.

It is a super-2 number, since 2×144220660105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14422066006 + ... + 14422066015.

It is an arithmetic number, because the mean of its divisors is an integer number (43266198033).

Almost surely, 2^144220660105 is an apocalyptic number.

It is an amenable number.

144220660105 is a deficient number, since it is larger than the sum of its proper divisors (28844132027).

144220660105 is an equidigital number, since it uses as much as digits as its factorization.

144220660105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28844132026.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 144220660105 its reverse (501066022441), we get a palindrome (645286682546).

The spelling of 144220660105 in words is "one hundred forty-four billion, two hundred twenty million, six hundred sixty thousand, one hundred five".