144166404264661 has 4 divisors (see below), whose sum is σ = 144166561014924. Its totient is φ = 144166247514400.

The previous prime is 144166404264587. The next prime is 144166404264671. The reversal of 144166404264661 is 166462404661441.

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 54897637578436 + 89268766686225 = 7409294^2 + 9448215^2 .

It is a cyclic number.

It is not a de Polignac number, because 144166404264661 - 2¹⁷ = 144166404133589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144166404264671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76987360 + ... + 78837721.

It is an arithmetic number, because the mean of its divisors is an integer number (36041640253731).

Almost surely, 2^{144166404264661} is an apocalyptic number.

It is an amenable number.

144166404264661 is a deficient number, since it is larger than the sum of its proper divisors (156750263).

144166404264661 is an equidigital number, since it uses as much as digits as its factorization.

144166404264661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156750262.

The product of its (nonzero) digits is 15925248, while the sum is 55.

The spelling of 144166404264661 in words is "one hundred forty-four trillion, one hundred sixty-six billion, four hundred four million, two hundred sixty-four thousand, six hundred sixty-one".