144447621601 has 16 divisors (see below), whose sum is σ = 153530298000. Its totient is φ = 135641495808.

The previous prime is 144447621583. The next prime is 144447621641. The reversal of 144447621601 is 106126744441.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1548501201 + 142899120400 = 39351^2 + 378020^2 .

It is a cyclic number.

It is not a de Polignac number, because 144447621601 - 2²⁹ = 143910750689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144447621641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2708671 + ... + 2761483.

It is an arithmetic number, because the mean of its divisors is an integer number (9595643625).

Almost surely, 2^144447621601 is an apocalyptic number.

It is an amenable number.

144447621601 is a deficient number, since it is larger than the sum of its proper divisors (9082676399).

144447621601 is a wasteful number, since it uses less digits than its factorization.

144447621601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55428.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 144447621601 in words is "one hundred forty-four billion, four hundred forty-seven million, six hundred twenty-one thousand, six hundred one".