2166144425201 has 4 divisors (see below), whose sum is σ = 2166719460672. Its totient is φ = 2165569389732.

The previous prime is 2166144425129. The next prime is 2166144425227. The reversal of 2166144425201 is 1025244416612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166144425201 - 2¹⁰ = 2166144424177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2166144925201) 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, 287512085 + ... + 287519618.

It is an arithmetic number, because the mean of its divisors is an integer number (541679865168).

Almost surely, 2^{2166144425201} is an apocalyptic number.

It is an amenable number.

2166144425201 is a deficient number, since it is larger than the sum of its proper divisors (575035471).

2166144425201 is an equidigital number, since it uses as much as digits as its factorization.

2166144425201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575035470.

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 2166144425201 in words is "two trillion, one hundred sixty-six billion, one hundred forty-four million, four hundred twenty-five thousand, two hundred one".