2145600320165 has 8 divisors (see below), whose sum is σ = 2574728521848. Its totient is φ = 1716474831040.

The previous prime is 2145600320153. The next prime is 2145600320233. The reversal of 2145600320165 is 5610230065412.

It can be written as a sum of positive squares in 4 ways, for example, as 1223658528481 + 921941791684 = 1106191^2 + 960178^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145600320165 - 2³⁸ = 1870722413221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2087159 + ... + 2940651.

It is an arithmetic number, because the mean of its divisors is an integer number (321841065231).

Almost surely, 2^{2145600320165} is an apocalyptic number.

It is an amenable number.

2145600320165 is a deficient number, since it is larger than the sum of its proper divisors (429128201683).

2145600320165 is an equidigital number, since it uses as much as digits as its factorization.

2145600320165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356279.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 2145600320165 its reverse (5610230065412), we get a palindrome (7755830385577).

The spelling of 2145600320165 in words is "two trillion, one hundred forty-five billion, six hundred million, three hundred twenty thousand, one hundred sixty-five".